^ IMO looks like a decency backtrace on graphics kexts after opening iPhoto. could be due to the graphics updates or a hardware problem. have you updated iPhoto? try reinstalling it.
dont worry unless it keeps on happening, then you might be in for harware issues.
Yes, an iPhoto update came with Mac OSX update in separated packages. So, i supposed it was just in order to make iPhoto compatible with this version.... well... lets see if it persists. If it does, i will reinstall iPhoto, then reinstall OS.. bla bla bla..
BTW i really miss the old times careful Apple you know??