Installed LCC 3.2, hoping for minor fixes and UI improvements, but my cursor was jumping to the edge of the screen every few seconds. Could find no repeatable pattern or timing, so I had to uninstall and revert to 3.1. Luckily, LCC 3.1 is mostly ok here, just need to remove the Scroll Enhancer thing. What a shame.

If you are going to try LCC 3.2, back up your "com.Logitech.Control Center.Assignments.registry" file in Preferences first. They do seem to carry over from 3.1 to 3.2 ok. But when I removed 3.2 to go back to 3.1, the uninstaller also wiped all preferences.

Logitech MX1000, MacPro3,1, OS X 10.6.2.

I had been using USB Overdrive with my Logitech MX1000 for years. My various experiences with LCC were very bad: It didn't recognize all the buttons on the mouse, it relied on haxies, it was not updated for serious bugs for long periods of time. But with the recent update for Snow Leopard, USB Overdrive (and Steermouse) does not support all of the buttons on several Logitech models. A fix is promised to come soon, and while I love USB Overdrive, promised features can take years to materialize, if they ever do. Some people are also saying that setup is even more convoluted than before (try adjusting tracking speed on 20 app profiles with 2 pop-up menus each). So in the mean time, I decided to give the free LCC 3.1 a try. I took some screenshots and notes of my USB Overdrive settings then used it's own uninstaller to remove it completely.

The LCC install went smoothly and after a restart, it recognized my MX1000 with no problems. I immediately notice that tracking is a little smoother. I also notice that vertical scrolling is extremely slow and/or high resolution. Better yet, tracking speed is a universal setting and not per-application. Scrolling, however, is per-app and even on the fastest setting is still slow for some. Tweetie, for example, scrolls slower on the full setting than USB Overdrive ever did. But I'm already getting used to this.

LCC's only other drawback is that there is no application profile overlap or punch through. I cannot, for example, make a profile for iTunes and reassign only the mouse thumb buttons perform keystrokes Command-[ and Command-] for back and forward, but use my global settings for everything else. In fact, I can't find a way to even copy my global settings into a new profile to at least have a common starting point. I tried using the "nothing" assignment in the pop-up menus for other buttons, but that just made them do, indeed, nothing. I'd love to know if I'm just missing the obvious here.

On the positive side, LCC 3.1 has fixed a few problems I was having with USB Overdrive and had mistakenly attributed to the mouse. The "back" thumb button was frequently registering two clicks when I'd hit it once. Tracking was very jerky in World of Warcraft when moving the camera quickly. Horizontal scrolling was more of a horizontal 10-pixel nudge, with no auto-repeat or acceleration. I couldn't assign anything to keys F16 through F19 because these were apparently new science. All of this is now history with LCC, and I'm loving that my aging MX1000, for which there is no modern equal, may still have a couple of years left in it.

I see that all is not well in comments here, and on Logitech's own forum. As I said above, I made sure to fully uninstall USB Overdrive before installing LCC, and I don't think I had any previous LCC preferences on this machine for the new version to pick up. I'm running a Mac Pro 3,1 (Early 2008) 8-core with OS X 10.6.1. There are no other input drivers running. LCC 3.1 is rocking here. For free!

I had been having trouble with the release version of Skitch freezing my entire system about 1 second after quitting. Then Delicious Library did the same. I thought I had tracked it down, but then Skype 5 also caused the same freeze after Quit, so I did a clean OS X install. One of the first re-installs was LCC, as I don't like the feel of native mouse tracking. I was launching Skitch after every installation, and Quit, and... freeze. Remove LCC 3.3, no more freeze.

I just paid for SteerMouse. Not only does it work perfectly (Mac Pro 3,1 running OS X 10.6.6 and a Logitech MX1000), but the developer replied to an email question within a couple of hours.

Bye bye, LCC. I thought version 3 was a fresh start. I was wrong.