Currently Being ModeratedJan 27, 2013 2:07 PM (in response to carelour)
Your preference files are probably corrupt.
1. hold down the option key
2. in the finder, in the Go menu, go to Library
3. in Library, open Preferences
4. find these files in Preferences and drag them to the trash:
This will generate new preference files so you will have to reenter your preferences, including your desktops. But your preferences will probably be fixed.
Currently Being ModeratedJan 27, 2013 2:23 PM (in response to arthur)
Thanks Arthur - I've done what you recommended and will report back in a day or two if everything continues to be a-ok. As a new Mac user, I'm curious as to what holding down the option key does in this scenario?
Currently Being ModeratedJan 27, 2013 2:25 PM (in response to arthur)
Too late - just did switch number 3 (for testing) and the background went blue again. I guess it's not the preference files.
Currently Being ModeratedJan 27, 2013 2:28 PM (in response to carelour)
~/Library is hidden by default in the Finder. Option key exposes the Library.
You are under warranty, I would take advantage of the call in option
check warranty https://selfsolve.apple.com/agreementWarrantyDynamic.do
Currently Being ModeratedMar 18, 2014 7:47 AM (in response to carelour)
I have this issue too, though it seemed to show up just with the latest Mavericks update