301220 - Intermittent rendering of borders with border-collapse:collapse

Status: RESOLVED DUPLICATE of bug 244135

(Core :: Layout: Tables, defect)

Description

[Etienne Dube]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; fr-FR; rv:1.7.8) Gecko/20050511 Firefox/1.0.4
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; fr-FR; rv:1.7.8) Gecko/20050511 Firefox/1.0.4

Table borders often disappear when using 'border-collapse: collapse'. There
seems to be some timing issue causing this bug.

For example, this URL points to a dynamic PHP page (built using Smarty templates
with some content from a PostgreSQL DB) served by a slow machine (P2/266, 128Mb
RAM, Win2000+Apache 2+PHP 4): 
http://indicateurs.crad.ulaval.ca/moz_border-collapse_testcase/index.php?entry=objectives&objectiveid=3

Vertical borders between cells disappear almost all the time, but sometimes
almost all the borders disappear. The borders are missing only in the initial
viewport; i.e. if I scroll down, the portion of the page that wasn't visible in
the initial viewport is rendered correcly. When scrolling up again, some parts
of the borders may reappear, but not always.

If I take the output of this PHP script, saving it in a html file using wget
with the URL above, and I put this html file on the same server (making the same
page statically available), it's rendered correctly:
http://indicateurs.crad.ulaval.ca/moz_border-collapse_testcase/static.html

Also, if I use the back button to come back to the last dynamic page viewed, it
displays fine (probably because Mozilla cached it). I also tried to serve the
dynamic pages from my fast workstation (dual P4/3.2ghz, 1GB RAM, WinXP,
Apache2+PHP4), they display fine too.

I may try to do a simplified test case later. But, as the problem is
intermittent and seems related to the server's response delay, it may prove useless.

This behavior happens in Firefox 1.0.4/Win32 and Mozilla 1.7/Win32. It doesn't
seem related to the graphics card or display driver, as it even happen over
Remote Desktop sessions. I didn't test other versions or platforms though.

This bug could be related to and/or a dupe of #103528 and #233532. I filled it
anyway because the context isn't really the same and these two bugs are old and
have been unassigned for a long time.


Reproducible: Sometimes

Steps to Reproduce:
Display a table with border-collapse, served from a slow server


Actual Results:  
Missing borders!

Expected Results:  
Borders!

Comment 1

[Etienne Dube]

Attachment: Table served from dynamic page, showing the problem

Comment 2

[Etienne Dube]

Attachment: Table served from dynamic page, scrolling down reveals correctly rendered borders

Comment 3

[Etienne Dube]

Attachment: Table served from static page (quick response from server), borders are rendered correctly

Comment 4

[Martijn Wargers (dead)]

Perhaps the same as bug 244135?

Comment 5

[Bernd]

*** This bug has been marked as a duplicate of 244135 ***