Great. Now we know it's a problem in your User's folder. Have you restarted in Safe boot mode?
Safe boot
* shutdown
* start the Mac and *wait* for the startup chime to sound
* after the sound, press and hold down the shift key
* keep holding and *wait* until the grey Apple logo appears
* now release the shift key and just wait (it could take a few minutes)
* eventually the login screen appears with the words SAFE BOOT
* continue to loginwhile in safe boot mode.
* open Disk Utility in Applications/Utilities
* run Repair Permissions
Please verify what version OS X. Your sig show 10.7.5
Please give exact details on how to reproduce. Screen shots would help.