I have noticed this problem lately, I think its a browser/software issue.
If you view very large graphical forum posts as you scroll (quickly?) towards the end of the post the pictures start to become corrupted with occasional horizontal lines. The number of lines vary from a couple to many.
I am running 3.0.5 Uberkernel with the standard browser, no patches.
Processor speed does not seem to affect the corruption.
Here are a few example posts, I would appreciate if a few other people could report back to confirm if this is repeatable on their Touchpads and therefore a software bug.
I have also noticed that the number of lines and their location can vary each time, they usually occur after fast scolling. Resizing the image will cause the picture it to be redrawn without corruption.