since I updated to 2.1.2. I have both the MX700 and the Dual Laser Notebook mouse and they are extremely unpredictable since the update. Today I purchased the VX and the MX Revolution and they are not fully programable with this driver software 2.1.2 Neither one could remember the W-Command keystroke and the One Button Search is totally NOT programable for anything but search. Yes you do have options i.e.; Spotlight, Google etc... but the button is not programable. This limits the options. The Thumb Wheel on the MX is worthless and hard to use without pushing the mouse around. Logitech really missed on these 2 new products and especially on this version of the driver. I have had good luck with the older versions and glad I still have them on disk.
Has Logitech abandoned the Mac user with this poor software? Also they do not provide enough documentation to be helpful. PASS ON THIS ONE for now.