Created attachment 630234 [details]
See screenshot. Reproducible in Thunderbird 12.0.1 (Ubuntu bundled), 13.0 (official), and 16.0a1 Nightly.
Bwinton, Andreas, any idea where do these icons come from? I could not see them in the format-buttons.png of gnomestripe theme. But i qute (windows) the icons for indentation are in that file. Do they come from the system (gnome) theme on linux?
Could this be a Linux icon theme problem I'm not seeing wizh my Linux icon theme? This icons are coming from GTK
Anthony, do you still see this behavior?
(In reply to Richard Marti [:paenglab] from comment #3)
> Anthony, do you still see this behavior?
Yes. Ubuntu 12.04 64-bit, Thunderbird Daily 17.0a1 2012-08-11.
Created attachment 651499 [details] [diff] [review]
Anthony, you're right. I have now a totally unpatched Ubuntu 12.04 and can see your problem. My old Ubuntu always showed the icons correct with gtk-unindent-ltr and gtk-unindent-rtl. Now with unindent and intent it works on both Ubuntus.
Andreas, I hope you have a non-Ubuntu system to check if the icons are still working.
I didn't see any regressions on Fedora 17 (also GTK+ 3.4), so we should be good. Going to look into the deeper cause a bit, but it works for us regardless it seems.
Comment on attachment 651499 [details] [diff] [review]
Also worked well when I tried the Force RTL, so I think we're good.
Verified fixed with Thunderbird 17.0a1 2012-08-21.