Just hoping this won't affect Tweetie. Obviously it's replaced by Twitter for Mac, but that doesn't work on Leopard. Some bugs have showed, for example, many Twitter clients now offer RT's in a "@user: ..." style. If this ends with a url the url won't work, because it includes the quotation marks in the link.

This is obviously a small thing and I don't really mind it not being fixed, but it'd be a pity if DM's break with this update.