My guess is if it only happens to myself and from looking at her post, DW, then it has something to do with our computer's being protected like Fort Knox...
What is odd, is that it happens randomly...
I suspect it might also be related to the browser I'm using at the time. I alternate between Firefox and Opera, but I can't recall which I've been using when I've lost the posts.
However, I do think all the security on a machine makes a significant difference... I use four anti-spy programmes, and Avast AV.
Though, I haven't yet added a firewall beyond the one that comes with XP.
Probably also explains why I have trouble doing port-to-port stuff with MSN and ICQ