another oddity for 10.6! I am running it on my new 17 uMBP and I am less than thrilled! I have 10.5 running on my other computers and am far happier. My experience so far has been trial and error and try not to install too much too quickly
I suggest that if you want it fixed, you make a post in the logitech forums and keep complaining to them so they can fix the bug. I will be doing the same.
OSX 10.6.1 has actually ran pretty flawless for me so far (and I'm using a hackintosh) except for this little issue.