viewing the contents of mobileme mail messages has broken, beginning with r77307. I hear that r73866 was supposed to be the fix for the bugs.webkit.org regression caused by r77307, but it hasn't fixed the mobileme mail regression, which presumably was unknown until now.
steps to repro:
1) login to http://www.me.com/mail
2) view any message
results: most messages will appear to be blank, or appear with just one line of text.
Created attachment 76429 [details]
Patch to fix backtracking to simple parenthenses
Simple parens are those with a fixed quantity and don't capture. There is a special case for these parentheses and that code didn't handle backtracking from nested parentheses.
Committed r73962: <http://trac.webkit.org/changeset/73962>