Usb Over Current Message?, Why am I getting this message? Options

[pushtobreak]

Anyone else ever get this message? It seems to be getting worse or maybe it's just bugging me more. I've only got a Logic7 dongle, a Motu fastlane midi interface and the qwerty/mouse plugged in. I thought it was the UC33 controller, but I'm still getting the message without it plugged in. I'm getting more ram soon could that be it?

I tried a USB hub to try recofiguring things. I was actually hoping to use another USB device. The hub didn't work at all. I did tons of research and found there have been some problems with hubs and macs. My problem was unpredictable behavior from the device(s) plugged into the hub. Now I just want to get to the bottom of the original problem, but if anyone has any advice about USB hubs I'd appreciate it.
The "USB overcurrent" message usually comes up after the computers been on for a bit, but usually not when I'm even using anything other than the qwerty/mouse. If I power down it usually solves the problem for a while.

Machine Name: Power Mac G5
Machine Model: PowerMac7,3
CPU Type: PowerPC G5 (3.0)
Number Of CPUs: 2
CPU Speed: 2 GHz
L2 Cache (per CPU): 512 KB
Memory: 512 MB
Bus Speed: 1 GHz