I'm suffering the same Open/Save dialog issue. You can reproduce it every time in Safari but it's a dice roll in FireFox.Safari crashes almost every time I try to upload an attachment to forums such as this one - I'm posting this from Firefox so I can attached the image below. FF also crashes occasionally doing the same thing, but a lot less than Safari.
I installed Snow Leopard on my 2.2GHz SR MBP. All I got for my trouble was screen freezes and kernel panics. I took it to the genius bar twice (once after archive and install, once after erase and install) and they said it was software related. My hardware was tested and they said it was ok.
The final straw was today when I got kernel panics on boot at least 10 times in a row. Finally got it to boot from the DVD and reinstalled tiger.
Conclusion: SL turned by MBP into a $2200 paperweight. I'm going to the Apple Store tomorrow to 1) Get another hardware test to confirm that it's not the problem and 2) return Snow Leopard.
Kernel Panics and screen lock ups sound like a hardware issue. It is possible that RAM, video card, etc, are working okay under your old operating system but are failing under the latest one.
Rather than have the geniuses blame software, you should ask them for a new SL installation disc and have them install it and confirm the issues. From there hopefully they can pinpoint what hardware is faulty.
Yet Another Update: I'm convinced now that my Safari/FF crash issue is related to 32/64 bitness, won't be able to prove that until later. Undoubtedly I have some 32bit plugin that simply fails. We've been discovering all sorts of issues today that are related to 32 vs. 64 bitness - app crashes, app issues, printer drivers etc. Work-around (won't call it a solution) is to simply run your app in 32 bit mode, voila, no more issues! Real drag to run your apps in 32 bit mode when you have a shiny new 64 bit OS, a real step backward. This is a real big problem in the Winders world as well with 64 bit XP and 2003 Server - you wind up installing nearly everything as 32 bit just so it'll work. This will sort itself out soon enough as companies start releasing SL 64 bit compatible updates to their products, meanwhile there is a work-around.
Eh, scratch just about everything I've said. Although Opera is infinitely more stable than other browsers (at the moment), it, too, is crashing. I've removed all browser-plugins, reinstalled updated browser plug-ins, purged browser and system caches, zapped PRAM/SMC, removed old system extensions, updated outdated system extensions, removed old preference panes, updated other pref panes, removed many app pref files, tried Safari in 64 and 32 bit modes, rebuilt permissions - all no joy. ;-( About the only thing I have not yet tried is working with a newly created, pristine user account.
I'm having the same problem.Vertical lines on Top Sites animations in Safari.
Mac Pro1,1 (April 2007) 2.66 with 10Gig of Ram was slow and sluggish compared to what it was under Leopard. Tried both upgrade and clean install to no avail. Reverted back to Leopard.