[MlMt] Strange newline behavior sometimes near paragraph breaks?

[Seebs]

Sometimes mailmate gets into a state wherein I have a paragraph, and a 
blank line, and more text. And then something happens such that, if I 
enter text at the beginning of the line after that, mailmate inserts 
another blank line.

And I am not sure what causes this, and I can't produce it on purpose, 
but once it's started it consistently happens. If I just delete the text 
and blank line, and then start a new paragraph, it happens again. If I 
start a paragraph, then leave it and go back and delete the extra blank 
line, things recover, apparently?

Seems to happen more often when there is much cutting and pasting and 
such going on.

-s