If width - border radius - border width goes negative, the shadow misses rounded corner.
Only happens on ToT so http://trac.webkit.org/changeset/76083 has this regression.
I'll post the fix in a few days.
Created attachment 79696 [details]
Created attachment 79888 [details]
Simon, Mitz, could you take a look at this? It should be a kind of obvious....
I'd like to fix this regression soon because this actually breaks things...
(In reply to comment #3)
> Simon, Mitz, could you take a look at this? It should be a kind of obvious....
Comment on attachment 79888 [details]
Looks sane to me.
Committed r77105: <http://trac.webkit.org/changeset/77105>
Landedl. Thanks Eric!