mozilla-b2g/gaia — pull request #7117 by dholbert (2012-12-20 19:05:29+00:00)
Title: bug 821221 workaround

Per https://bugzilla.mozilla.org/show_bug.cgi?id=821221#c12 , there's a non-trivial painting bug that's causing labels on SMS-app buttons to not paint, when they're enabled. I dug into it for around 2 days, and it looks like it's a cairo bug (or at least, a bug where the same display list gets painted differently depending on the conditions).

Fortunately, this workaround (adding opacity:0.99 to the buttons when they're enabled) seems to avoid the bug.