Less and Less words can be used,and the word counter is stuck!! I took out 1/2 my PM rely and it STill gave the same count and when i tried to refresh I lost the whole rely!!!
When you reply to a PM, do you keep or delete the original message within it? I think the word count just stops on 1,000+, regardless of how much over it is and it counts the all the words in your message <b>and</b> the one you are replying to if you leave it there.
Try deleting the old message and see if that sorts it