LAST EDITED ON 04-27-07 AT 11:48 AM (EST)I used to have that fustrating problem, and it was cured for me when I began turning off the firewall when I wanted to post. I also had to turn it off the get pictures uploaded, or check profiles.
My firewall just didn't get along with RTVW, but, oddly, it worked OK with sites where security is even more of a issue, i.e., Ebay, P-Pal, bank accounts, investmant accounts.
A revision to the firewall software (or maybe I just loaded it correctly during an update) cured the problem. I use IE, and Zonealarm, and symantec anitvirus.