I received a comment asking what laptop wouldn't run Ubuntu. I have to say that I ran Ubuntu on that laptop for almost a year. It was fine. It was only after an upgrade to Gutsy that things started not working. It is an Acer Aspire 5100. And, as another comment indicated, I think it has to do with the 64-bit thing.
As for PCLinux, so far I am happy. Except I had a Skype conference call this morning that didn't go well; I couldn't hear them at all. Was it PCLinux? Probably not. But it is curious that it happened now. I was very happy to see that Flash works perfectly, though. I didn't have to log in to Windows to check the latest updates to the course materials.
We'll see what I think in a week or two or a month or two. I still have Ubuntu Gutsy on my other machine, so I don't feel totally disloyal!