does this happen to anyone else? my main box has 1g ram, it seems generally adequate, tho thrashwaits of several seconds can happen with heavy use. after just such times my desktop background may sometimes seem suddenly to have numerous adjacent rectangles swapped, sometimes a whole array of same, quite funky to look at. then sometimes also/instead the fonts rendering firefox and/or libreoffice may be partly replaced with funky hieroglyphics. sometimes relaunching the app is sufficient, sometimes i need to relaunch X. this has happened 2-3 times/month for quite awhile, hasn't gotten worse or better, i always keep natty uptodate, i remember the same happening with maverick, perhaps even earlier. could be hardware, could be software, tho if software you'd think we'd be hearing about it..? surprisingly i've not seen a single instance of data corruption tho.