RIM released updates to all of its IM apps at once. If you use Google Talk, AIM, Yahoo Messenger, Windows Live Messenger, or ICQ, make sure to download version 2.5.69 of these apps. You can download them in BlackBerry App World or point your BlackBerry Browser to mobile.blackberry.com and click on Instant Messaging under Communications. RIM did not make any change logs available for these updates, so there are no published specifics on what changes were made to the applications.
RIM also released an update to their native BlackBerry Twitter app bringing the version number to 1.0.1.7. RIM did not provide a change log, and there do not seem to be any major modifications to the application. Visit App World to download the update, or visit www.blackberry.com/twitter to download the update OTA.