Comment 12 for bug 789691

I have recipe for a solution for this problem. Ideally it would be fixed upstream in the themes but for now....

For the theme Humanity which appears to be the default on my machine:
in /usr/share/icons/Humanity/actions/ there are several subdirectories with a file called media-playback-start.svg (these are the playback icons).

Using inkscape I flipped them horizontally. (for png's, you might want to use convert for this.) and save the file to media-playback-start-rtl.svg

I then ran gtk-update-icon-cache /usr/share/icons/Humanity to update the cache.

Voila... Stuff starts working.

I will attach a tarball with the updated icons to save others the inkscape learning curve.

Similiar results have been achieved on Fedora using convert and png's.