Comment 14 for bug 444449

This happens to me too. I use Ubuntu Karmic 9.10, 32 bit. Firefox 3.5.4.
It isnt as slow as the original poster reports, but it still is pretty annoying. It scrolls down in a "choppy" way, especially when there's an image (it shows the top of the image, repeated, covering the whole reader area, and takes a while to actually alow you to see, so it makes it impossible to "flick trough the news").

Interestingly, the Google Reader Prism available on the repositories seems to scroll "somewhat" faster.

I also tried Arora, it scrolls like a dream.