Keyword Assistant (KA) for iPhoto received a 9/10 MacOSXHints rating back in August 2004 as a Pick of the Week. It's been a great productivity enhancer, until iPhoto was updated past 6.0.2 -- Ken Ferry has not updated KA since then, and he designed it to limit KA's features when an iPhoto version beyond 6.0.2 was installed.

This was terrible for me, since I depended so much on KA -- I emailed Ken several times to no avail -- and then browsing VersionTracker's comments one day, I noticed this suggestion by editcandy:

Quit iPhoto -- Find your iPhoto application -- Control-click and choose Show Package Contents -- Drill through the following directories: Contents -> NetServices -> Bundles -> KeywordAssistant.NetService -> Contents -> MacOS. Open KeywordAssistant in your favorite text editor (I like Smultron). Search for the phrase: WarnForiPhotoVersionsAbove and change the version number that immediately follows to something that corresponds to your current version of iPhoto -- Good luck.

Well, it works just as advertised, and I'm happily using KA with iPhoto 6.0.4. Hope some others find this useful.

[robg adds: The file you're editing is binary, so you'll mainly see gibberish on the screen. But if you search for the specified text and replace the version as instructed, this tip does indeed seem to make KA fully functional again -- hooray! And hopefully Ken will be able to find the time to update the application sometime in the future; it's something I rely on so much, I often forget it's not part of iPhoto.]