644108 - Whenever scrolling an hyperlink with the mouse pointer, the FF 4.0 window background moves up and down on its side frame

Status: RESOLVED DUPLICATE of bug 633282

(Firefox :: General, defect)

Description

[Larryfilm]

User-Agent:       Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101 Firefox/4.0
Build Identifier: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101 Firefox/4.0

Every time I move the mouse pointer to a link within a website or a bookmark, the link address appears in a popup menu at the bottom left of the FF window (that part is OK), BUT the grey/shiny effect on the Firefox Window frame moves up and down on its sides. It's that grey limit/line/separation on the upper 1/3 of the Firefox window frame, on its left and right side (with: 4 mm): it moves up and down a ½ cm every time scrolling (without clicking) on any website links, creating an "animation" that is disturbing and annoying.

Reproducible: Always

Steps to Reproduce:
1.Scroll on a link 
2.Check the moving design on the Firefox Window side frame.
3.



Theme used: standard FF 4.0 theme (no persona used).