In the process of upgrading and migrating from a eMac OS10.3.9 to a Mini OS10.5.8 with all its peripherals I discovered that a USB Power Hub was causing the fan in the MINI to turn on when I put it to sleep. If the Hub is not accompanied by a power plug there is no problem. This only happens on the mini, I have other macs, PC's and Linux boxes that do not have a problem with a power hub, or this power hub. A conversation with Apple support revealed that it can happen with SOME hubs, so I'm wondering if there are any portable USB power Hubs that would be recommended?

The only peripheral that was plugged into the hub at the time that the problem revealed itself was a Logitech RF Dongle for a MX Revolution mouse. The mouse will not work with the Dongle plugged into the hub if the power is not connected but does work if I place the Dongle on a USB extension cable.

I've had good luck with these hubs (I have three) and if I swap it with another the results are the same.

Any suggestions would be welcomed.