Laptop specs are
here.
I've been through Kubuntu, and now openSuse 11. I'm encountering the same problem now with openSuse. I'm running KDE4.
Here's the situation. My wife is using the laptop to look through wedding pictures (about 3.8Gb on the hdd) to put an album together. She's using gwenview to browse them, and after about ten minutes the laptop slows to the point that it is literally unusable. The mouse cursor moves, but that's about it. I end up having to do a hard reset. She's getting angry and wants XP back.
I've tried F-spot, but I couldn't seem to get it to organize the photos by filename, which is what I need. Any help would be greatly appreciated.