[BirdOPrey5]

That's the first time I've seen that issue- I'm afraid I have no option to shorten the default text- it's coming from the page title not the mod itself. I take it shortening the forum title is out of the question.

You could edit the more_share_option template and find the first instance of this code:

data-url="{vb:raw bophref}"

and right after it, in the same line, add:

data-text="Description..."

Where you replace Description... with a short description that will be the default text for EVERY tweet. Hopefully your users enter some additional info.