I had the same problem with the email client. I tried Claws (another email client you could download from Maemo). Neither worked just too many messages .... BUT when I updated N800 to OS2008 Claws working like a charm. No problem with 3000+ messages. In general, I advise moving to OS2008: Pidgin works better than older gaim IM, NPR media player works to stream, etc. I have not regretted updating -- usually I DO regret an upgrade!