Since I downloaded build 38568 and afterwarts 38586, Safari does not start anymore. The following message appears:
WebKit failed to open correctly on your previous attempt. Please disable any Safari extensions that you may have installed. If the problem continues to occur, please file a bug report at http://webkit.org/quality/reporting.html
Safari 3.12 does start normal. I did not install the recent Apple security package (maybe important info?).
Thanks for fixing this. WebKit is the best!
Please attach a crash log. See <http://webkit.org/quality/crashlogs.html> for info.
Fixed with r38592.