I would like to share an issue I've been having with a Logitech Wave Keyboard Combo. Since the installation of SL 10.6.2, LCC 3.1.0 supplied by Logitech seems to unable to change from de default Apple Layout to the Logitech Keyboard Layout. In my specific case, I use a Portuguese Logitech Wave Keyboard, and I can't change it to "Logitech Portuguese".

The solution I've found to overcome the problem, was downloading ukelele 2.0b3. I don't even need to install ukelele, since I've found inside the dmg a Folder called Logitech which contains the "Logitech Portuguese" layout.

So, the solution is to copy the chosen language keyboard layout into /Users//Library/Keyboard Layouts.

After that go to preferences and chose the new Logitech Layout, it works flawless and no more issues with LCC 3.1.0 :)

Download link for Ukelele...   

http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=Ukelele