Logitech has released version 9.76 of Mouseware; Mouseware being the common drivers which are used on most of their pointing devices. Revit users who use Logitech hardware (which I like better than Microsoft's) may have noted that their mouse speed drops when Revit starts - a known problem.

With version 9.76 Logitech users can download a utility which allows additional edits to the Windows registry to fix this. Download and install the 9.76 driver, then download and run the "Advanced Settings Utility", a small 140kb non-installing program to add the registry settings needed to ensure mouse speed is the same in all applications.