After upgrading my iPhone 4 to iOS 5.0.1, Xcode has been giving me the following error message when debugging my Migraine Diary app remotely:
warning: Unable to read symbols for /Users/aaron/Library/Developer/Xcode/iOS DeviceSupport/5.0.1 (9A405)/Symbols/System/Library/AccessibilityBundles/AccessibilitySettingsLoader.bundle/AccessibilitySettingsLoader (file not found).
warning: No copy of AccessibilitySettingsLoader.bundle/AccessibilitySettingsLoader found locally, reading from memory on remote device. This may slow down the debug session.
I tried deleting the directory and having Xcode pull down the symbols off of the phone again. No success. I ended up copying the contents of the main SDK bundles into the one in my local library. Solved it. Not sure if this is the right solution but it works. I vaguely remember this happening last time Apple released a small point release.
So copy the following directory:
/Users/[your login name]/Library/Developer/Xcode/iOS DeviceSupport/5.0.1 (9A405)/Symbols/System/Library/