User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:12.0a1) Gecko/20120111 Firefox/12.0a1
Build ID: 20120111031049
Steps to reproduce:
-Install latest nightly, clean profile
-Make gfx.content.azure.enabled to true
-load about:config and/or about:memory and a bugzilla page with enough comments to scroll
-white hbox (about:config) and body (about:memory) background appear to be drawn too low - equivalent to the size of the browser toolbars - you can check by opening/closing bookmarks toolbar or switching tabs on top, the white background will shift up or down to be an equivalent size
- Opening and closing the sidebar will shift the white background to the right, equivalent to the width of the sidebar
On a bugzilla page the div#bugzilla-body will be affected by the sidebar being open when scrolling - it will paint it's background shifted to the right, equivalent to the width of the sidebar, but only for parts of the page that have been offscreen (i.e. not painted). This problem is not exhibited with a closed sidebar.
The page elements should not be effected by browser chrome.
I am not au fait with the thebes wrapper but I guess it would be easy to assume that these elements are being drawn either doubly offset from the whole browser window or offset from the content window bounds when they should be offset from the whole browser window.
Also, I have not extensively tested so the specific page elements with problems may not be exhaustive.
Created attachment 587749 [details]
Buzilla page with sidebar after being scrolled down then up
Top left of grey Buzilla div background is shifted right/not drawn after scrolling
Created attachment 587750 [details]
about:config page showing issue
about:config hbox background is shifted downwards equivalent to the height of the browser chrome.
Confirming - Setting to NEW
Browsed the top 100 sites on alexa.com to find other cases of this bug, which hopefully should help.
www.youtube.com - div.feed-item.upload - on subscription page
www.reddit.com - div.linkinfo - on a comments page
www.imgur.com - div.panel.Left
etsy.com - div.section
newegg.com - div.grpSearch
verizonwireless.com - DIV#oo_tab.oo_tab_right
Created attachment 588304 [details]
Border Radius Test
The problem seem to point to border-radius. (If it wasn't obvious to the devs before)
I made a quick testcase.
Created attachment 588305 [details]
Border Radius Test
*** Bug 717782 has been marked as a duplicate of this bug. ***
*** Bug 718198 has been marked as a duplicate of this bug. ***
*** Bug 725267 has been marked as a duplicate of this bug. ***
Created attachment 606328 [details] [diff] [review]
Mark transform dirty properly