The patch for Bug 9911 caused a minor regression where document.dir should return an empty string in <head>. This matches what production Safari 2.0.4 (419.3) does. Note that Bug 9947 covers the "real" fix to document.dir, which can't be set in <head> and which is currently linked to body.dir (unlike Firefox and MSIE).
Created attachment 9493 [details] Patch v1 Changes document.dir to return an empty string instead of undef in <head>.
Comment on attachment 9493 [details] Patch v1 r=me
Committed revision 15479.
Mass removal of NeedsRadar keyword from my bugs that have already been RESOLVED.