So, I love using my new 24" iMac. Especially when I'm playing WoW, which is almost all I do. But recently I've been having some serious issues. Just after the last WoW patch I began to have video artifacts on the screen, first it was a fence that did not end and now it's become pretty bad at times. To add insult to injury I've been getting full lockups that need power cycling to recover from and I have applications, that I've used forever, that won't run anymore. They either crash when starting and give me the, "do you want to try again?" message or they just don't ever load. I checked the knowledge base and found one guy who's having similar issues but WoW says it's the video card and not them. Most of the Apple replies I've found are about fixing bad fonts and running hardware checks. I checked my fonts, deleted the ones that came out bad or off. I also booted from my diagnostic disc and ran the test ten times. It came up negative every time. Anyone have a similar problem or suggestion?