Steps to Reproduce: On any scrollable page, click on one of the scroll buttons in rapid succession. Actual Results: Page scrolls faster than Mozilla can redraw, resulting in artifacts at either the top or bottom of the page, i.e. each 'line' (approximately 10 pixels) of screen may be repeated up to three times. The more you scroll rapidly, the more artifacts build up. The display is rendered correctly if you force the window to redraw, for example, dragging another window over the affected window. Expected Results: The page should render correctly once scrolling is complete regardless of the means or speed of scrolling. Build Date & Platform: M14 MacOS Additional Information: Bug does not occur when scrolling with the arrow keys, only when clicking on the scroll buttons.

*** This bug has been marked as a duplicate of 33602 ***

Verified dup of bug 33602