Created attachment 76382 [details] crash dump from r73888 was looking at webkit2 pages at webkit.org site, no other activity, may be related to some of the other crashes (to note, the memory usage was suspicious, about 1G, should not be in those numbers) crash dump attached
Another crash like bug 50625, with a different backtrace.
The platform was wrong (the default is always wrong), forgot to correct that, doing it now...
I've changed from WinXP to Win7 (broken disk, change not necessarily to better, but anyhow), so I am not able to provide any status checks anymore. Generally, however, I saw no repeatable crashes before the (disk & OS) change, so I'd say by me it's ok.