I have same problem - can change subtitles size in Settings but with no effect. Totem 1.2.1 with xine-lib 1.0.1 Breezy.
-- Font size adjust wont work with external subtitles https://launchpad.net/bugs/37587 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
