It is actually quite annoying as you only find that out when you try to send, so then you edit it down, and down, and down and are then left with an incoherent message (well some say I start with that anyway). I think the trick is rather than to �reply� it is to start a �new PM�. The other annoying thing though is that when you do actually reply to a PM, the message disappears from the page, so me being me (millions of PM friends dontyouknow), forgets what was in the message that you were replying to.