here a picture:

what can cause it or how to fix? happened also after recreating the Disk On Key of Ubuntu Desktop 12.04 64 Bit
also while exiting the icons have appeared suddenly. and after wxiting, i was in the LiveCD but none of the program i've installed there was there.
may it be a bug? should tell it in launchbag?
Thanks for helping.
edit: finally, my way to recognize was trying to reduce every partition, and the one which here minimun of size was bigger than the other-it's windows!
Hope this is helping for you (: