Chrome currently disables compositing for RTL pages (the compositor isn't quite ready for it yet) however it does it too late, after the GraphicsLayer tree has been built. As a result RLT pages don't always render correctly. For example:
renders completely blank.
Also tracked as crbug:
Created attachment 96327 [details]
Comment on attachment 96327 [details]
Committed r88288: <http://trac.webkit.org/changeset/88288>