I had a really long post (33K of text) that I wanted to make. When I preview it the system kicks me out saying "connection reset". As soon as I do a short post and preview it accepts it. (usatracy also complained of connection reset issues - and I suspect he might have been suffering from the same limitation).
Now, I can accept that there might be a need to limit post lengths. However, it would be better if the system enforced those limits in other ways.
I haven't lost any work so it's not a big deal. I'll just have to resort to other means to get my message to the folks I want to get my message to.