123678 - Page display error at high resolution on Kuro5hin.org (definitely render engine bug)

Status: RESOLVED WORKSFORME

(Core :: Layout, defect, P4)

Description

[Erik Moeller]

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (Windows; U; WinNT4.0; en-US; rv:0.9.8) Gecko/20020204
BuildID:    2002020406

Loading http://www.kuro5hin.org at resolutions lower than or around 800x600
works fine. However, at higher resolutions around 1024x768, the rendering is
flawed: First, the left table column which contains the recent story links and
the broad middle column which contains story headlines and intros are loaded
fine. Then, the right table column, which contains the user info (if logged in)
etc. is loaded. This pushes the other columns to the left. At this point, the
left column is "garbled", i.e. parts of the "box" which says "Subscribe to K5"
are "torn out" of the table. It looks really weird and not like something that
can be produced with HTML at all.

This only happens *sometimes* and apparently only at high resolutions, and (in
my tests) *only* if the user is logged in. It's one of these very obscure, hard
to reproduce bugs, but probably appears on a number of similar pages with
complex table layouts. I think this has been in Mozilla for a long time, at
least I cannot remember using a build that didn't have it.

Reproducible: Sometimes
Steps to Reproduce:
1. Go to http://www.kuro5hin.org and reload the page several times in various
high resolutions. Perhaps this can already produce the bug.
2. If not, create an account, login and try again. 
3. You may have to set the number of stories to be displayed higher than the
default to reproduce my configuration. My setting is: Number of story summaries
to show on main page == 30 (this can be set in "Display Preferences" if you're
logged in). 

Actual Results:  See Summary

Expected Results:  Render page correctly

Comment 1

[Erik Moeller]

Attachment: Screenshot of bug in action

This shows the rendering bug on my system

Comment 2

[Chris Petersen]

Changing QA Contact

Comment 3

[Nick Stenz]

I just came here from K5...

I browse K5 every day @ 1024x768x24bpp at both home and work, and I've never
seen this happen. I'd say it's a bug in your video driver, but it certainly does
look like Mozilla isn't re-drawing part of its display space properly. However,
I can't say I've ever been able to reproduce this problem.

Might I ask what video card is in your system?

Comment 4

[Erik Moeller]

I find it highly unlikely that my video card (NVIDIA RIVA TNT2 M64) or driver is
responsible for that problem as I don't have any other similar problems. Note
that the bug doesn't happen all the time even on my system, so it may take some
time to reproduce. I'll try to find similar sites that have it.

Comment 5

[Andrew Hagen]

Reporter, are you still seeing this bug on recent Mozilla releases? If you are,
please try a complete reinstallation. Does that solve the problem?

Comment 6

[Michael Lefevre]

WFM win2k, 1.0. no response from reporter for >30 days, so resolving as WFM.

reporter (Erik): if you can reproduce this with a clean install of a recent
version of mozilla (e.g. 1.0), please reopen this bug and comment again with
more details.  thanks.