Not an answer to your problem, but it did make me look and see Logitech finally updated LCC (a few months ago really, I'm slow) to 22.214.171.124, so thank you
I have another and pretty strange issue, i must admit it! And it's the first time it's happened! It's about my Logitech K260 keypad don't work while it worked fine under the build 12B13!
it work fine under Lion 10.7.5 build 11G36 and Win 7 x64 too!
Edit: Reinstalled B13 using Pacifist, so any files not present in both updates are still there, all works fine again. It wouldn't take too much trouble to narrow down the exact cause, but for an update that does not seem to provide any benefits that I can see, not worth the time or trouble.