If you log into battle/net it will upgrade your version to 1.15.3. Not sure how many people here still play it besides me, but it is very nice to see Blizzard still supporting this game so long after it's release.

And here's what it does:

"Bug Fixes
- Fixed a communication bug affecting third party leagues.
- Alt-F6 no longer stalls the game on Windows.
- Game now works correctly on versions of Mac OS X which do not support 256-color mode."

Nothing major really, but once again just nice to see the continued support, even in the face of Starcraft II.

Interestingly enough I learned something from this update as well. When my game refused to update because of some error I thought it was the fault of Blizzard. It turns out though, that it was because my Starcraft folder had simply been copied over from an old installation, and was therefore missing a registry key needed for updates. Once I added a few strings, a key and modified the key's path, it worked. SO now I know that not only do I need backups of my program files folder, but I need to pay closer attention to my registries as well.