[Plugin: TinyMCEComments] Problem when refreshing page

Works great but then if I refresh the page – mid sentence – it comes back with the the text already there but if I then type once again it seems to only allow two characters before automatically inserting a line-break. This only appears to happen in Firefox (Mac). Whereas in Safari the page refreshes but the previous text is removed and it’s okay to continue typing.

http://wordpress.org/extend/plugins/tinymcecomments/