Installed this version last night and it's working ok so far for my 10.3.9 system. Using Cary's tip to leave the mouse icon in the dock seems to help (but I have no data as to how it would be w/o). They even seem to have fixed the obnoxious delayed response after awaking my VX Revolution from sleep. In version 1.9.3 I had traced this behavior back to the com.Logitech.ControlCenter.Daemon.plist file, which used to grow in size at a rate of about 4kb an hour to 1MB over a couple of weeks and made my mouse really sluggish. As soon as I had replaced this plist file with a small back-up copy, the mouse was more responsive again, so I did this routinely once a week. In 2.2.2 this plist file so far appears to stay stable in size - crossing my fingers! I'm also curious as to whether the issue has been resolved where removing the USB receiver could cause all kinds of problems, incl. eventual Kernel panics on restart - only fixable by safe booting, uninstalling and reinstalling LCC. I'll find out about this in the near future I reckon.