407518 - Wrong caption background for groupbox on tabpanel on Linux

Status: RESOLVED DUPLICATE of bug 236107

(Firefox :: General, defect)

Description

[Leon Stringer]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9b1) Gecko/2007110903 Firefox/3.0b1
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9b1) Gecko/2007110903 Firefox/3.0b1

The caption for a groupbox element on a tabpanel in a XUL page is shown with a white background, not the default gray one. This is the wrong color for the theme breaking the appearance of the page.

This appears to be specific to a groupbox caption on a tab (it appears correctly if it is not on a tab).

I've tested this with a caption label and a checkbox, both a painted with the wrong background.

It appears to be specific to Linux (looks OK on Mac and Windows).

Reproducible: Always

Steps to Reproduce:
1. Create a XUL page.
2. Include a tabbox
3. Include a groupbox in the tabbox.
4. Include a caption in the groupbox.
Actual Results:  
Caption appears with a white background.

Expected Results:  
Caption appears with the same gray background as all other interface elements.

This is seen on 2.0.0.11 and 3.0 beta 1.

Screenshot of this problem at http://homepage.ntlworld.com/leon.stringer/firefox/tabtest.png