I think this is the correct forum for this post as I'm beginning to be convinced that this is an OS X issue. I'm using a Logitech Navigator Wireless USB mouse and keyboard plugged directly into a USB port on my Mac Mini. I am a new switcher and VERY happy about it, so unfortunately I do not have pre-Tiger analysis of this problem. I am experiencing Mouse and Keyboard lock-ups or freezes about once a day which usually can be solved by unplugging and replugging the USB wireless receiver. I have the latest logitech driver which support 10.4 and have repaired permissions. Have read around the web that users have been experiening this for years. Annoying to say the least, and this is the only real problem I've had with Tiger. Is this an OS problem or should I blame my kybd/mouse, which I really like to use? Any recommendations?