Thanks to Jack and Christofer for the detailed info! Just to let all know, Ubuntu must have fielded a bit of flack as they posted a security update for the linux kernel, I downloaded it and that seems to have fixed the problems I was having. On a related note, I'm leaning strongly towards Oren's idea of having separate drives for OS and data as a means of preventing future problems. I want to be able to fiddle around with the OS without endangering all of my files and this sounds like a good way to go. Once I get another drive installed and make everything work, I'll post the details to the list. Once again, thanks!