I know this may sound like a stupid question, but is it possible to have too many USB devices on a computer? I have a 1.83ghz mini and lately I've been having trouble with USB devices not plugged right into the computer itself. This includes a few hubs I've tried and the USB ports on my monitor. Some examples would be: 1. My apple aluminum keyboard, sometimes I have to unplug it and plug it back in when I start the computer or it won't work. 2. Just today, my iPhone wouldn't sync through a USB hub I've been using for quite some time but when I plugged it into my mac, it worked perfectly. Any help would be appreciated.