391265 - Mac OSX scrollbar graphic corruption when JavaScript is disabled

Status: RESOLVED DUPLICATE of bug 379916

(Core :: Widget: Cocoa, defect)

Description

[Jake]

User-Agent:       Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.9a7) Gecko/2007080209 GranParadiso/3.0a7
Build Identifier: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.9a7) Gecko/2007080209 GranParadiso/3.0a7

When JavaScript is disabled in FF 3.0A1-7, scrolling will cause either scrollbar to redraw incorrectly, leading to a messed up appearance. This is the case when deactivating JS in prefs or via NoScript addon. When using NoScript the problem is confined to pages (even individual tabs) where JS is blocked and will not appear on pages/tabs where JS is allowed.

This was tested with FF3.0A1-7 with default settings on current OSX10.4 with and without any addons. The problem does not occur on Camino 1.5.

Reproducible: Always

Steps to Reproduce:
1.Install latest Gran Paradiso Alpha7 on MacBook with current OSX 10.4
2.Deactivate Javascript via preferences or install NoScript addon
3.Load page larger than screen, causing scrollbar to appear
4.Rapidly scroll by clicking and dragging the scrollbar
Actual Results:  
When scrolling down/right the scrollbar button will leave "clones" of itself behind at intervals dependent on the scroll speed. This appearance will persist while scrolling but in some cases will be properly redrawn upon releasing the mouse button. Moving the mouse pointer over the scrollbar again will properly redraw the bar in any case.

When scrolling up/left the scrollbar button is missing the top/left tip and "collects" previously created fragments.



Expected Results:  
The expected behaviour would be to properly and smoothly redraw scrollbar buttons the same as other native OSX apps.

Comment 1

[Jake]

Attachment: Screenshot illustrating the buggy behaviour