As I'm asked directly here:
You've run in one of the bugs out of the bucket full of them in fw 5.9.<anything>. But really in one of the less nasty ones...
There's a
little chance to get rid of the unneeded icon for the KUAL kindlet. It's stored in: /developer/KUAL/metadata/thumbnail.jpg in the user visible storage - just delete it there and do a reboot.
As I've strictly avoided to update to 5.9.x, I only can
guess that this
could help, but I wasn't able to test it. Please report back what happened. Unfortunately, it's possible that the new 5.9.x internal database structure keeps a copy of the icon inside the system area. Then you're out of look. But the useless icon in your library doesn't do any harm at all...