Build Identifier: http://hg.mozilla.org/mozilla-central/rev/4cb8f88213f5 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:18.0) Gecko/18.0 Firefox/18.0 ID:20121004030525 Steps to reproduce: 1. Open https://addons.mozilla.org/en-US/firefox/extensions/?sort=created&page=1 2. Click "Next>" button at bottom of list till there are listed dimmed incompatible add-ons --- observe the dimmed incompatible add-ons 3. Scroll page up/down --- observe the dimmed incompatible add-ons Actual results: Ghost elements are drawn behined the dimmed incompatible addons. Expected results: No ghost elements are drawn. There are 2 regression ranges. #1 Dimmed incompatible addons are missing #2 Ghost elements are drawn behined the dimmed incompatible addons #1 regression window(m-i) Good: http://hg.mozilla.org/integration/mozilla-inbound/rev/c0ef7fe877d2 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:18.0) Gecko/18.0 Firefox/18.0 ID:20121002093917 Bad(Dimmed incompatible addons are missing): http://hg.mozilla.org/integration/mozilla-inbound/rev/bca6d709dba2 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:18.0) Gecko/18.0 Firefox/18.0 ID:20121002102017 #1 Pushlog: http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=c0ef7fe877d2&tochange=bca6d709dba2 #2 regression window(m-i) Bad(Dimmed incompatible addons are missing): http://hg.mozilla.org/integration/mozilla-inbound/rev/f8af70ee46f7 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:18.0) Gecko/18.0 Firefox/18.0 ID:20121003105316 Bad(Ghost elements are drawn behined the dimmed incompatible addons): http://hg.mozilla.org/integration/mozilla-inbound/rev/4cc97bf59962 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:18.0) Gecko/18.0 Firefox/18.0 ID:20121003111917 #2 Pushlog: http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=f8af70ee46f7&tochange=4cc97bf59962

Screen capture: http://youtu.be/G5y-M-EQC3A

gfx.content.azure.enabled = false helps.

Suspected: Bug 797314,Bug 797231

This was fixed in mozilla-inbound by 488949441eb3 Bas Schouten — Bug 797797: Get the new device offset after pushing the new DT. r=roc