I am using Safari as I have for years with MDC. The last few days I have had Safari crash every time I try to reply to a thread on MDC. It isn't happening on any other website I use. In fact, it hasn't happened while I have been writing this post which surprises me because normally it happens within 30 seconds of each time I start replying to a post. It has been happening when I post in private forums, if that makes a difference when you look into it. I have made it through this post just fine - first time all week I have been successful. I have given up several times because of the need to reopen Safari and find the thread and repost each time.
I am having this issue as well.
It is an issue with Safari. From what I have gathered from Huddler, upgrading Safari to 6.1.1 (if you are using MacOS X 10.8.5) or to Safari 7.0.1 (If you are running Mavericks 10.9) seems to fix the issue. :)
Adina mama to B 4/06 and E 8/13/12 (on her due date!)