All .0 and .5 upgrades from Adobe (and most other software developers are paid upgrades, although .5 upgrades usually aren't as much as a .0 upgrade.
Again, I have to say it:
If Adobe had done "intermittent" OS X releases, or even a paid OS X beta program, they would have made a TON of money, had much more goodwill from Mac users, and would probably not be in the red for this last quarter...
Oh well. At least the upgrades will be here soon...