Just got this software update.

[rvittori]

Not sure what it is for but this is the message that was listed.

QuickTime Broadcaster 1.5.2 delivers increased compatibility with Mac OS X Leopard and provides important bug fixes.

 

[mkrishnan]

1.5.2 is dated 12/07...

http://www.apple.com/downloads/macosx/apple/application_updates/quicktimebroadcaster152.html

Could it be that you installed the broadcaster off your install DVD, somewhat recently? If you did, then your computer would check online for an update when it next checked and ask you to install the updated (newer than your DVD, but not new) version.