This is reproducible in metrofx, but not on desktop, so filing this in apzc. Attaching screenshot. STR: 1) get a beta account on irccloud.com (turn around time is short) 2) login to a channel and let it accumulate enough text to scroll 3) sign out of the room 4) scroll the view with the mouse wheel result: overlayed text on the upper banner, white flashing, misc. other rendering glitches.

Is this a recent regression? It sounds similar to bug 959781 which is a regression from bug 951554.

I don't really want to create an account to test this :( Is there a standalone test case that reproduces the problem?

If anybody has an irccloud account and can reproduce this on Metro or B2G it would help to save a local copy of the page and turn it into a reduced testcase.

Metro-specific bug so I'm closing it out. We can reopen it or file a new one if metro ever gets resurrected.