It's common security practice to release the exploit before the bug is patched in the OS. Oh wait, no, the opposite of that. Unless you're Apple. I'm very angry.
Presumably because the vulnerability is already known outside of Apple, and it's better not to hold back the iOS patch while they get the OSX patch done.
I don't know - I can't imagine that nobody on their security team pointed out that someone would promptly reverse engineer the patch and figure out that OS X is also vulnerable.
I haven't upgraded to Mavericks, and I haven't been able to replicate the bug. I've been applying other updates, everything except Mavericks, all along.
The reason I'm in 1.8.5 is because I upgraded to Mavericks, but one of their updates forced me to recover from Time Machine (which wasn't as smooth as I expected)