486557 - Overflow: auto causing large pages to become blank partway through.

Status: RESOLVED DUPLICATE of bug 215055

(Firefox :: General, defect)

Description

[danlew22]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.8) Gecko/2009032711 Ubuntu/8.04 (hardy) Firefox/3.0.8
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.8) Gecko/2009032609 Firefox/3.0.8

When making a very large section of the page that is wrapped with a div that has "overflow: auto" set on it, part of the div (when you scroll down) becomes invisible/unrendered.  It appears to be behind a white object that covers up all content.

This only happens on very large pages when you scroll down far enough.  On my sample page it only occurs right near the bottom of the page, and the file is almost 200kb.

Reproducible: Always

Steps to Reproduce:
1. Create a page that contains a div with "overflow: auto" set on it.
2. Put a huge amount of content within the aforementioned div.  It can be anything - text, tags, whatever - so long as there are spaces in it (so it all doesn't end up on one line).
3. Scroll to the bottom of the page.
Actual Results:  
The content eventually becomes hidden behind a white, unrendered box.

Expected Results:  
It should display all the content.

I've tried this page out on many different versions of Firefox and on many different operating systems with mixed results.  On any operating system where it appears on one version of FF, it appears to occur on all versions of FF.  I've seen the bug in Windows 2000 and Windows XP, but not in Windows Vista nor Ubuntu.  Some people I've talked to see it on XP, others don't.

In other words, the bug is reliably reproducible if the problem happens at all; but if it doesn't, I can get it to appear.