A while ago, an OS X update had a strange side effect on my MSN client: after a CR to send an instant message, the focus was lost and the caret was disappearing from the editing area. Very painful because it required to click again in that area before typing a new line... I ended up switching to another instant messenger. Yesterday, I installed a few OS X updates, apparently all unrelated to this kind of issues and BANG the focus is back in MSN's editing area... Is Apple distributing minor fixes inside unrelated bigger patches? (yes, I verified the instant messenger client was not updated itself)