354664 - Background (set via CSS) of <span> tags rendered differently at different Text Size settings

Status: UNCONFIRMED

(Core :: Layout, defect)

Description

[Sebastian Bergmann]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.7) Gecko/20060916 Firefox/1.5.0.7
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.7) Gecko/20060916 Firefox/1.5.0.7

I am generating a HTML file that shows PHP sourcecode with highlighting of syntax and code coverage. For the latter I use the background color of a <span> that enclosed the line.

At the normal Text Size these lines sometimes do not match up: one is a tiny bit longer/shorter than another. Changing the Text Size, either making it larger or smaller, fixes this.

I have attached two screenshots that demonstrate this effect.

Reproducible: Sometimes

Steps to Reproduce:
1. Open the HTML document (attached).
Actual Results:  
The background of lines 69 and 70 and lines 74 and 75 does not match up (see screenshot #1).

Expected Results:  
The background of lines 69 and 70 and lines 74 and 75 match up.

Comment 1

[Sebastian Bergmann]

Attachment: HTML document that demonstrates the problem.

Comment 2

[Sebastian Bergmann]

Attachment: CSS stylesheet for the HTML document that demonstrates the problem.

Comment 3

[Sebastian Bergmann]

Attachment: HTML document that demonstrates the problem rendered at normal text size.

Comment 4

[Sebastian Bergmann]

Attachment: HTML document that demonstrates the problem rendered at increased text size.

Comment 5

[Sebastian Bergmann]

Problems also exists in Firefox 2.0 RC1.

Comment 6

[Andrew Schultz]

Attachment: original HTML document referencing CSS attachment

worksforme with linux SeaMonkey 2006-09-30-10-trunk and SeaMonkey 1.0.5