#22 Session timeout causes loss of message

[Anonymous]

If you are typing a new message, and you exceed the
session timeout doing this (default is 30 min), you will
get a generic error message and all the text you typed
is lost. Back arrow is not possible, due to the use of
HTTP POST. Without some kind of recovery mechanism, this
is a very, very bad user experience.

[Nobody/Anonymous]

Logged In: NO

I have to second this - I'm getting complaints.