Dell is quite behind with their drivers. I use LaptopVideo2Go's 91.52 driver and it works a lot better than the Dell one for me. It doesn't turn the monitor off when you close the lid though, which can be a hassle. However, I like it because it prevents the movies that I am watching on the external monitor from being shut off.
cdd, I go to UF! Can't wait for the UF vs. GA game this season. We're gonna chomp you guys!