Posted by Gábor Hojtsy on April 25, 2013 at 2:51pm
We need help testing these issues and providing patches/feedback to improve Drupal 8 RTL support. There are some regressions that should be fixed sooner than later! All help is welcome!
Here is a complete patch for the installer to be RTL right after the profile selection step: http://drupal.org/node/1974040 - it works, needs testing/reviews.
The default core theme Bartik is broken currently in an RTL setting, needs help to figure this out and fix as well as test: http://drupal.org/node/1979392
Thanks to anyone who helps!