Comment 7 for bug 229949

The problem has to do with how much cpu resources it takes to render the guide. If you look at top while in the guide you'll see that X is near 100%. I believe it has something to do with the live video window being displayed in the upper righthand corner.

Anyway, if desktop effects is an option for you (i.e., if you have video card that supports it), then turning on compositing in xfce mitigates the problem, making the guide more usable.

Note this isn't an actual solution, as whatever is causing all the overhead is still causing it. The extra work is just being pushed to the graphics card instead.