I'm seeing a semi-colon appearing after quotes in tweets...
I had a support thread a while back about this where quote showed up in tweets as -- i think it was -- html character entities.
So my excerpt starts: Patrick from Popehat: "It would behoove . . .
And the tweet comes out: Patrick from Popehat: ";It would behoove . . .
With that extra semi-colon after the double-quote