I just got a dell 640m in the mail, so far I love it, no problems... except for one. The screen makes my eyes bleed after I use it for more than 20 minutes. Its crisp and looks great..... but it makes my eyes really hurt. My old toshiba's screen was amazing, I could stare at it for hours without feeling a thing. I thought its because it has a higher rez 1440x900 vs 1280x768, but decreasing it doesn't make much difference. Anyone have a similar problem?