I've been beating my head against the desk all day trying to fix this!!!
I have tried the suggested xcode-select -switch /path/to/xcode/ as suggested here but it still gives me this error!
I have now completely removed XCode 4.4 and the command line tools as well, and running the xcrun still gives me this error!
Even installing a new copy of Xcode and the command line tools produces this error!!
Result of commands..
sh-3.2# xcode-select -print-path
/Applications/Xcode.app/Contents/Developer
sh-3.2# xcrun -find
xcrun: Error: could not stat active Xcode path '/Volumes/Xcode/Xcode45-DP1.app/Contents/Developer'. (No such file or directory)
The solution that finally worked was by reinstalling 10.8, reinstalling Xcode, and then reinstalling the command line tools.