I've noticed that it's difficult to get a Linux installation to play nice with Internet video.
I like Linux and use it as my primary desktop at work. But I have a Windows laptop alongside the real workstation, for viewing Internet videos, websites that require Flash, and doing Webex and a few other applications that are tough or impossible on Linux.
IMO video is the main reason Linux won't ever take over a significant percentage of "typical-users". Typical users use their computers as much for viewing media entertainment as doing work. And Linux is still way behind the curve on video. Unless you're an uber-geek and enjoy d!cking around for hours with codecs and drivers.
I used to enjoy that. Now I just want to watch the damn video. And for that, there's Windows.