I've installed the Bitcoin-qt client from the Sourceforge download...

http://sourceforge.net/projects/bitcoin/files/Bitcoin/bitcoin-0.8.1/bitcoin-0.8.1-macosx.dmg/download

...with SHA1 matching...

5b47f0b7727a64893ac63068e39ebf126e8afdd1

The 'About Bitcoin' dialog declares it to be "v0.8.1-beta". Was this an error in packaging? Or are even final releases being called 'beta'?