To reproduce: open the URL, then choose Use ATSU for All Text from the Debug menu and force a repaint. Notice how the period moves to the right of the Hebrew letter. Probably regressed in <http://trac.webkit.org/projects/webkit/changeset/28298>.
fast/text/ATSUI-spacing-features.html fails in pixel mode because of this bug.
<rdar://problem/5664872>
Created attachment 18163 [details] Pass style (including writing direction) to ATSUILayoutParameters
Fixed in <http://trac.webkit.org/projects/webkit/changeset/29021>.