I'm having very similar problems to the OP, here's the crash log in case any tech wizards can provide insight
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Process: Safari [7183]
Path: /Applications/Safari.app/Contents/MacOS/Safari
Identifier: com.apple.Safari
Version: 7.0 (9537.71)
Build Info: WebBrowser-7537071000000000~3
Code Type: X86-64 (Native)
Parent Process: launchd [168]
Responsible: Safari [7183]
User ID: 502
Date/Time: 2013-10-07 11:50:04.465 +1100
OS Version: Mac OS X 10.9 (13A598)
Report Version: 11
Anonymous UUID: C5B2C31B-9D0E-D3E3-6594-0ED85DD0BB41
Sleep/Wake UUID: 79D54A44-2DDA-46FB-9929-B97B470CF911
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
External Modification Warnings:
Thread creation by external task.
Debugger attached to process.
Application Specific Information:
Process Model:
Multiple Web Processes
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[BrowserTabViewItem wkViewOrWebView]: unrecognized selector sent to instance 0x61800018f150'
terminating with uncaught exception of type NSException
abort() called
Application Specific Backtrace 1:
0 CoreFoundation 0x00007fff8a2f141c __exceptionPreprocess + 172
1 libobjc.A.dylib 0x00007fff8fddce75 objc_exception_throw + 43
2 CoreFoundation 0x00007fff8a2f42ed -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
3 CoreFoundation 0x00007fff8a24f5b2 ___forwarding___ + 1010
4 CoreFoundation 0x00007fff8a24f138 _CF_forwarding_prep_0 + 120
5 .GlimsInternal 0x0000000110489bc5 -[MHOBrowserTabViewItem _mho_URLString] + 21
6 .GlimsInternal 0x0000000110488bd5 -[MHORolloverImageButton _mho_setRolloverImage:] + 458
7 Safari 0x00007fff946daf04 -[AttachedTabButton(FileInternal) _updateControlImages] + 969
8 Safari 0x00007fff946d8233 -[AttachedTabButton windowBackgroundDidChange] + 29
9 CoreFoundation 0x00007fff8a238010 -[NSArray makeObjectsPerformSelector:] + 480
10 Safari 0x00007fff94940ae3 -[TabBarView(Internal) _windowBackgroundDidChange] + 59
11 Safari 0x00007fff9493a870 -[TabBarView viewDidMoveToWindow] + 95
12 AppKit 0x00007fff8d1e81d0 -[NSView _setWindow:] + 2899
13 CoreFoundation 0x00007fff8a225639 __53-[__NSArrayM enumerateObjectsWithOptions:usingBlock:]_block_invoke + 137
14 CoreFoundation 0x00007fff8a224ddf -[__NSArrayM enumerateObjectsWithOptions:usingBlock:] + 319
15 AppKit 0x00007fff8d92a952 __21-[NSView _setWindow:]_block_invoke712 + 231
16 AppKit 0x00007fff8d1e819f -[NSView _setWindow:] + 2850
17 CoreFoundation 0x00007fff8a225639 __53-[__NSArrayM enumerateObjectsWithOptions:usingBlock:]_block_invoke + 137
18 CoreFoundation 0x00007fff8a224ddf -[__NSArrayM enumerateObjectsWithOptions:usingBlock:] + 319
19 AppKit 0x00007fff8d92a952 __21-[NSView _setWindow:]_block_invoke712 + 231
20 AppKit 0x00007fff8d1e819f -[NSView _setWindow:] + 2850
21 CoreFoundation 0x00007fff8a225639 __53-[__NSArrayM enumerateObjectsWithOptions:usingBlock:]_block_invoke + 137
22 CoreFoundation 0x00007fff8a224ddf -[__NSArrayM enumerateObjectsWithOptions:usingBlock:] + 319
23 AppKit 0x00007fff8d92a952 __21-[NSView _setWindow:]_block_invoke712 + 231
24 AppKit 0x00007fff8d1e819f -[NSView _setWindow:] + 2850
25 AppKit 0x00007fff8d1e8f9a -[NSView removeFromSuperview] + 350
26 AppKit 0x00007fff8d207b00 -[NSWindow setContentView:] + 74
27 Safari 0x00007fff9477a6e4 -[BrowserWindow dealloc] + 50
28 AppKit 0x00007fff8d1f0632 -[NSWindow release] + 193
29 AppKit 0x00007fff8d4ceaad -[_NSFullScreenTransition setFullScreenWindow:] + 37
30 AppKit 0x00007fff8d4d57b3 -[_NSWindowFullScreenTransition _cleanUpAfterExit] + 60
31 libdispatch.dylib 0x00007fff9174f1d7 _dispatch_call_block_and_release + 12
32 libdispatch.dylib 0x00007fff9174c2ad _dispatch_client_callout + 8
33 libdispatch.dylib 0x00007fff91754443 _dispatch_after_timer_callback + 77
34 libdispatch.dylib 0x00007fff9174c2ad _dispatch_client_callout + 8
35 libdispatch.dylib 0x00007fff9174e8a1 _dispatch_source_invoke + 413
36 libdispatch.dylib 0x00007fff91753eaa _dispatch_main_queue_callback_4CF + 244
37 CoreFoundation 0x00007fff8a258839 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
38 CoreFoundation 0x00007fff8a213b14 __CFRunLoopRun + 1636
39 CoreFoundation 0x00007fff8a213275 CFRunLoopRunSpecific + 309
40 HIToolbox 0x00007fff89e67f0d RunCurrentEventLoopInMode + 226
41 HIToolbox 0x00007fff89e67cb7 ReceiveNextEventCommon + 479
42 HIToolbox 0x00007fff89e67abc _BlockUntilNextEventMatchingListInModeWithFilter + 65
43 AppKit 0x00007fff8d1d128e _DPSNextEvent + 1434
44 AppKit 0x00007fff8d1d08db -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 122
45 Safari 0x00007fff9471a4a0 -[BrowserApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 161
46 AppKit 0x00007fff8d1c49cc -[NSApplication run] + 553
47 AppKit 0x00007fff8d1af803 NSApplicationMain + 940
48 Safari 0x00007fff948ea76d SafariMain + 267
49 libdyld.dylib 0x00007fff961c55fd start + 1
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fff8afd8866 __pthread_kill + 10
1 libsystem_pthread.dylib 0x00007fff8ccd635c pthread_kill + 92
2 libsystem_c.dylib 0x00007fff897cabba abort + 125
3 libc++abi.dylib 0x00007fff96031141 abort_message + 257
4 libc++abi.dylib 0x00007fff96056abc default_terminate_handler() + 264
5 libobjc.A.dylib 0x00007fff8fddd30d _objc_terminate() + 103
6 libc++abi.dylib 0x00007fff960543e1 std::__terminate(void (*)()) + 8
7 libc++abi.dylib 0x00007fff96054456 std::terminate() + 54
8 libobjc.A.dylib 0x00007fff8fddd0b0 objc_terminate + 9
9 libdispatch.dylib 0x00007fff9174c2c1 _dispatch_client_callout + 28
10 libdispatch.dylib 0x00007fff91754443 _dispatch_after_timer_callback + 77
11 libdispatch.dylib 0x00007fff9174c2ad _dispatch_client_callout + 8
12 libdispatch.dylib 0x00007fff9174e8a1 _dispatch_source_invoke + 413
13 libdispatch.dylib 0x00007fff91753eaa _dispatch_main_queue_callback_4CF + 244
14 com.apple.CoreFoundation 0x00007fff8a258839 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
15 com.apple.CoreFoundation 0x00007fff8a213b14 __CFRunLoopRun + 1636
16 com.apple.CoreFoundation 0x00007fff8a213275 CFRunLoopRunSpecific + 309
17 com.apple.HIToolbox 0x00007fff89e67f0d RunCurrentEventLoopInMode + 226
18 com.apple.HIToolbox 0x00007fff89e67cb7 ReceiveNextEventCommon + 479
19 com.apple.HIToolbox 0x00007fff89e67abc _BlockUntilNextEventMatchingListInModeWithFilter + 65
20 com.apple.AppKit 0x00007fff8d1d128e _DPSNextEvent + 1434
21 com.apple.AppKit 0x00007fff8d1d08db -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 122
22 com.apple.Safari.framework 0x00007fff9471a4a0 -[BrowserApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 161
23 com.apple.AppKit 0x00007fff8d1c49cc -[NSApplication run] + 553
24 com.apple.AppKit 0x00007fff8d1af803 NSApplicationMain + 940
25 com.apple.Safari.framework 0x00007fff948ea76d SafariMain + 267
26 libdyld.dylib 0x00007fff961c55fd start + 1
Thread 1:: Dispatch queue: com.apple.Safari.SnapshotStore
0 com.apple.CoreFoundation 0x00007fff8a1deab0 __CFStringAppendFormatCore + 1584
1 com.apple.CoreFoundation 0x00007fff8a1de43e CFStringCreateWithFormat + 238
2 com.apple.security 0x00007fff95eeaeb4 Transform::getAH(void const*, bool, bool) + 552
3 com.apple.security 0x00007fff95eeb6d1 Transform::SetAttributeNoCallback(void const*, void const*) + 35
4 com.apple.security 0x00007fff95ee8c2e DigestTransform::Setup(void const*, long) + 1364
5 com.apple.security 0x00007fff95ee96c8 SecDigestTransformCreate + 50
6 com.apple.Safari.framework 0x00007fff9492efe1 Safari::fileLocationForSnapshotWithURL(Safari::CF::String const&, bool) + 130
7 com.apple.Safari.framework 0x00007fff9492eaee Safari::SnapshotStore::handleDeleteSnapshot(Safari::CF::String const&) + 40
8 com.apple.Safari.framework 0x00007fff9492f8d1 Safari::callFunctionWithSuddenTerminationDisabled(WTF::Function<void ()> const&) + 30
9 libdispatch.dylib 0x00007fff9174f1d7 _dispatch_call_block_and_release + 12
10 libdispatch.dylib 0x00007fff9174c2ad _dispatch_client_callout + 8
11 libdispatch.dylib 0x00007fff9174e68f _dispatch_queue_drain + 451
12 libdispatch.dylib 0x00007fff9174f9dd _dispatch_queue_invoke + 110
13 libdispatch.dylib 0x00007fff9174dfa3 _dispatch_root_queue_drain + 75
14 libdispatch.dylib 0x00007fff9174f193 _dispatch_worker_thread2 + 40
15 libsystem_pthread.dylib 0x00007fff8ccd6ef8 _pthread_wqthread + 314
16 libsystem_pthread.dylib 0x00007fff8ccd9fb9 start_wqthread + 13
Thread 2:: Dispatch queue: com.apple.libdispatch-manager
0 libsystem_kernel.dylib 0x00007fff8afd9662 kevent64 + 10
1 libdispatch.dylib 0x00007fff9174e43d _dispatch_mgr_invoke + 239
2 libdispatch.dylib 0x00007fff9174e152 _dispatch_mgr_thread + 52
Thread 3:: WebCore: IconDatabase
0 libsystem_kernel.dylib 0x00007fff8afd9962 pread + 10
1 libsqlite3.dylib 0x00007fff9087b1d4 unixRead + 100
2 libsqlite3.dylib 0x00007fff908a15ee readDbPage + 478
3 libsqlite3.dylib 0x00007fff908a018d sqlite3PagerAcquire + 349
4 libsqlite3.dylib 0x00007fff908feccf clearDatabasePage + 95
5 libsqlite3.dylib 0x00007fff908fedb3 clearDatabasePage + 323
6 libsqlite3.dylib 0x00007fff908fedb3 clearDatabasePage + 323
7 libsqlite3.dylib 0x00007fff908fedb3 clearDatabasePage + 323
8 libsqlite3.dylib 0x00007fff908fedb3 clearDatabasePage + 323
9 libsqlite3.dylib 0x00007fff908c7bbb sqlite3VdbeExec + 55147
10 libsqlite3.dylib 0x00007fff908b940a sqlite3_step + 666
11 com.apple.WebCore 0x00007fff91b663f9 WebCore::SQLiteStatement::executeCommand() + 89
12 com.apple.WebCore 0x00007fff91b8a297 WebCore::SQLiteDatabase::clearAllTables() + 279
13 com.apple.WebCore 0x00007fff91b693c2 WebCore::IconDatabase::syncThreadMainLoop() + 178
14 com.apple.WebCore 0x00007fff91b6609f WebCore::IconDatabase::iconDatabaseSyncThread() + 303
15 com.apple.JavaScriptCore 0x00007fff8f52144f WTF::wtfThreadEntryPoint(void*) + 15
16 libsystem_pthread.dylib 0x00007fff8ccd5899 _pthread_body + 138
17 libsystem_pthread.dylib 0x00007fff8ccd572a _pthread_start + 137
18 libsystem_pthread.dylib 0x00007fff8ccd9fc9 thread_start + 13
Thread 4:: com.apple.CoreAnimation.render-server
0 libsystem_kernel.dylib 0x00007fff8afd4a1a mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fff8afd3d18 mach_msg + 64
2 com.apple.QuartzCore 0x00007fff8c2623b7 CA::Render::Server::server_thread(void*) + 195
3 com.apple.QuartzCore 0x00007fff8c2622ed thread_fun + 25
4 libsystem_pthread.dylib 0x00007fff8ccd5899 _pthread_body + 138
5 libsystem_pthread.dylib 0x00007fff8ccd572a _pthread_start + 137
6 libsystem_pthread.dylib 0x00007fff8ccd9fc9 thread_start + 13
Thread 5:: com.apple.NSURLConnectionLoader
0 libsystem_kernel.dylib 0x00007fff8afd4a1a mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fff8afd3d18 mach_msg + 64
2 com.apple.CoreFoundation 0x00007fff8a214315 __CFRunLoopServiceMachPort + 181
3 com.apple.CoreFoundation 0x00007fff8a213939 __CFRunLoopRun + 1161
4 com.apple.CoreFoundation 0x00007fff8a213275 CFRunLoopRunSpecific + 309
5 com.apple.Foundation 0x00007fff893e0907 +[NSURLConnection(Loader) _resourceLoadLoop:] + 348
6 com.apple.Foundation 0x00007fff893e070b __NSThread__main__ + 1318
7 libsystem_pthread.dylib 0x00007fff8ccd5899 _pthread_body + 138
8 libsystem_pthread.dylib 0x00007fff8ccd572a _pthread_start + 137
9 libsystem_pthread.dylib 0x00007fff8ccd9fc9 thread_start + 13
Thread 6:: com.apple.CFSocket.private
0 libsystem_kernel.dylib 0x00007fff8afd89aa __select + 10
1 com.apple.CoreFoundation 0x00007fff8a25fd43 __CFSocketManager + 867
2 libsystem_pthread.dylib 0x00007fff8ccd5899 _pthread_body + 138
3 libsystem_pthread.dylib 0x00007fff8ccd572a _pthread_start + 137
4 libsystem_pthread.dylib 0x00007fff8ccd9fc9 thread_start + 13
Thread 7:: JavaScriptCore::BlockFree
0 libsystem_kernel.dylib 0x00007fff8afd8716 __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fff8ccd7c3b _pthread_cond_wait + 727
2 com.apple.JavaScriptCore 0x00007fff8f52c145 JSC::BlockAllocator::blockFreeingThreadMain() + 261
3 com.apple.JavaScriptCore 0x00007fff8f52144f WTF::wtfThreadEntryPoint(void*) + 15
4 libsystem_pthread.dylib 0x00007fff8ccd5899 _pthread_body + 138
5 libsystem_pthread.dylib 0x00007fff8ccd572a _pthread_start + 137
6 libsystem_pthread.dylib 0x00007fff8ccd9fc9 thread_start + 13
Thread 8:: JavaScriptCore::Marking
0 libsystem_kernel.dylib 0x00007fff8afd8716 __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fff8ccd7c3b _pthread_cond_wait + 727
2 com.apple.JavaScriptCore 0x00007fff8f52cbb7 JSC::GCThread::waitForNextPhase() + 119
3 com.apple.JavaScriptCore 0x00007fff8f52ca48 JSC::GCThread::gcThreadMain() + 88
4 com.apple.JavaScriptCore 0x00007fff8f52144f WTF::wtfThreadEntryPoint(void*) + 15
5 libsystem_pthread.dylib 0x00007fff8ccd5899 _pthread_body + 138
6 libsystem_pthread.dylib 0x00007fff8ccd572a _pthread_start + 137
7 libsystem_pthread.dylib 0x00007fff8ccd9fc9 thread_start + 13
Thread 9:: JavaScriptCore::Marking
0 libsystem_kernel.dylib 0x00007fff8afd8716 __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fff8ccd7c3b _pthread_cond_wait + 727
2 com.apple.JavaScriptCore 0x00007fff8f52cbb7 JSC::GCThread::waitForNextPhase() + 119
3 com.apple.JavaScriptCore 0x00007fff8f52ca48 JSC::GCThread::gcThreadMain() + 88
4 com.apple.JavaScriptCore 0x00007fff8f52144f WTF::wtfThreadEntryPoint(void*) + 15
5 libsystem_pthread.dylib 0x00007fff8ccd5899 _pthread_body + 138
6 libsystem_pthread.dylib 0x00007fff8ccd572a _pthread_start + 137
7 libsystem_pthread.dylib 0x00007fff8ccd9fc9 thread_start + 13
Thread 10:: JavaScriptCore::Marking
0 libsystem_kernel.dylib 0x00007fff8afd8716 __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fff8ccd7c3b _pthread_cond_wait + 727
2 com.apple.JavaScriptCore 0x00007fff8f52cbb7 JSC::GCThread::waitForNextPhase() + 119
3 com.apple.JavaScriptCore 0x00007fff8f52ca48 JSC::GCThread::gcThreadMain() + 88
4 com.apple.JavaScriptCore 0x00007fff8f52144f WTF::wtfThreadEntryPoint(void*) + 15
5 libsystem_pthread.dylib 0x00007fff8ccd5899 _pthread_body + 138
6 libsystem_pthread.dylib 0x00007fff8ccd572a _pthread_start + 137
7 libsystem_pthread.dylib 0x00007fff8ccd9fc9 thread_start + 13
Thread 11:: JavaScriptCore::Marking
0 libsystem_kernel.dylib 0x00007fff8afd8716 __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x00007fff8ccd7c3b _pthread_cond_wait + 727
2 com.apple.JavaScriptCore 0x00007fff8f52cbb7 JSC::GCThread::waitForNextPhase() + 119
3 com.apple.JavaScriptCore 0x00007fff8f52ca48 JSC::GCThread::gcThreadMain() + 88
4 com.apple.JavaScriptCore 0x00007fff8f52144f WTF::wtfThreadEntryPoint(void*) + 15
5 libsystem_pthread.dylib 0x00007fff8ccd5899 _pthread_body + 138
6 libsystem_pthread.dylib 0x00007fff8ccd572a _pthread_start + 137
7 libsystem_pthread.dylib 0x00007fff8ccd9fc9 thread_start + 13