Andre Gerber goes through the misc. disadvantages and troubles he's found with Ubuntu.
Read it in his blog here
About a week of continuous Linux usage (I felt very proud of myself), I saw that I needed to print a photo. Wait. Let me clarify: I didnt NEED to print the photo, but I really wanted to. Anyway, so there I was, trying to get the printer to work, when I finally came to the conclusion that Linux does not support my printer very well. I have the Canon PIXMA ip5000, and the only printer driver available in Ubuntu in the PIXMA series was the ip4000 Printer. I decided to install that driver and hope for the best.