Currently Being ModeratedOct 10, 2012 8:46 AM (in response to SCalkins)
Have you tried starting in Safe Mode and see if the problem still occurs?
Restart holding the "shift" key.
(Expect it to take longer to start this way because it runs a directory check first.)
If this works look in System Preferences > Users & Groups > Login items and delete any third party login items (-), you can always add them back with the (+). Also look in /Library/Startup Items. Nothing is put in that folder by default, so anything in there is yours.
Currently Being ModeratedNov 30, 2012 8:17 PM (in response to markwmsn)
Pointing me back to System Preferences | Mission Control helped me fix this.
I had to turn "Group Windows by Application" back on, then my windows stayed open on the desktops.
I've gotten used to 4 finger swiping to switch desktop spaces.
thanksOS X Mountain Lion (10.8.2)