23" Cinema won't wake when connected to 13" MBP unibody USB ports

My 23" Cinema Display has difficulty waking from sleep when it's connected to either of the USB ports of my 13" MacBook Pro unibody. There are times when it won't come on at all and I have to force a shut down, disconnect the USB cable and restart, whereupon things are fine until the computer sleeps again. I can run the display with no problems at all if I don't connect the USB cable to the computer.
I would love to have the functionality of the two USB ports on the back of the monitor, so if anyone has a solution or any ideas, I'm all ears. Thanks!

Stange we have had the same problem with our 17" MPB and display this morning....

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