I'm running Snow Leopard (10.6.2) and I'm using version 3.2 of both Xcode and Interface Builder. I'm noticing that Interface Builder is not being kept in sync with my Xcode project when I add or alter outlets and actions and then do a Save. I always have to explicitly save any UI changes inside IB and/or invoke Reload All Class Files from the Interface Builder's File menu before new or altered outlets and actions show up properly when I control-click on my App Delegate icon. I notice that the Library/Application Support directory for Interface Builder is called Interface Builder 3.0, even though I'm definitely using version 3.2 of that software. In the General Section of Interface Builder's Properties pane, I have the following items checked: -When documents activate: Synchronize with Xcode -When documents open: Restore active objects -When documents save: Preserve bundle contents I have tried to fix this a number of ways. First of all, I exited Interface Builder and Xcode, deleted the following files and directories, and then restarted Xcode: -Library/Preferences/com.apple.Xcode.plist -Library/Preferences/com.apple.InterfaceBuilder3.plist -Library/Preferences/com.apple.InterfaceBuilder3.LSSharedFileList.plist -Library/Caches/com.apple.Xcode -Library/Caches/com.apple.InterfaceBuilder3 -Library/Application Support/Developer/Shared/Xcode -Library/Application Support/Interface Builder 3.0 However, after doing all this, Interface Builder still refuses to auto-synch with Xcode. Has anyone else seen this problem where the 3.2 version of Interface Builder doesn't auto-synch with version 3.2 of Xcode under Snow Leopard? This used to work fine for me under the earlier versions of Interface Builder and Xcode under Leopard. Can anyone tell me what I might be doing wrong, or how to fix this auto-synch problem?