Just updated to Xcode 5 and this is the first error its throwing on the logger for all my apps. Can\'t seem to understand why this is happening.
2013-09-
I'm on Mavericks (10.9.3) and encountered the same error in xCode(5.1.1).
I tried anything - reinstalling xCode from both AppStore and dmg. Resetting the emulator resulted in the same error and deleting the Simulator SDK folder gave no results too.
The issue on my end was indeed Moom as mentioned by @aorcsik! Disabling it's accessibility, followed by clean (cmd+shift+k) in xCode cleared the error.