People have been asking for it, I ended up writing it myself... Now you are able to restrict the number of character in your TinyMCE editors and display the number of characters left, nice n' easy!
It works with TinyMCE3.x . I have tested it with IE 7.0, Safari Version 3.1 (5525.13) and FF 126.96.36.199
It works when the user Pastes or while Typing...
1. Add the unzipped directory in your tiny_mce/plugins/ folder
2. Add maxchars to your plugins list
3. In your init function for the editor add:
max_chars : 100,
max_chars_indicator : "lengthBox",
max_chars: (int: Maximum Characters), max_chars_indicator: (string: The id of an INPUT or any tag that accepts innerHTML in js (ie. DIV, SPAN))
I haven't made it to work with BBcode. However it works with plain or HTML code.