This happens to me too. I know the cause - don't know the cure...
After logging in and when you open the 'Edit box' to post a reply or do a new message if you take too long in composing the message the response does not get posted - just a blank message - the title remains.
I have learned to do the message and if a long time in composing I copy it to the clip board and then post. If it doen't appera correctly, I re-log in and then paste the message into a new response box and then post again. It is a pain but it works.
It appears there is a time-out tht occurs if you are in an edit box too long. I have not encountered this in the general forum, but there I usually am 'clicking around'.
David
IQXP Software
http://www.iqxp.com
LiveWire Update Service
PO Box 1417
Fairfield, IA 52556
641-472-8393
http://www.livewire-cablesoft.com/