I have a Logitech MX900 Bluetooth mouse that I've been using for two years now. Typically I have the two side buttons set up to do Expose functions, and have never had an issue getting those to work. But it seems that with the 10.4.4 update I can no longer get the Expose "Desktop" function to work with any button on my mouse. The "All Applications" function works fine with every button, but oddly the "Desktop" function does not. Any ideas?