USB printer not recognized by TC unless plug is removed, reinserted

Just picked up a TC 500GB for my new MBP and everything works great, even network printing to my old Samsung ML-1430 laser (via the USB port). But there's one hitch: the printer is at home, I don't use it that often, and so it's off most of the time. When I turn it back on, though, queued print jobs don't run and my computers can't see the printer... UNTIL I disconnect the USB cable and plug it back in, at which point print jobs start flowing and everything is great.
Weird issue. I've never seen anything like it (and I did try a different USB cable), so I wondered if anyone else had experience with this sort of thing? The printer used to work great when directly connected to a Vista box, and did properly register itself over USB when powered up, so I don't know what the problem could be.
I'm tempted just to leave the printer on all the time, but it no longer goes back into an "idle" state (like it did when new) after printing; it's quite loud.
Thanks in advance for any advice.
(I have the newest 10.5.4 update and the newest TC firmware installed.)

Also, I should note that the printer is USB1.1 while TC has a 2.0 port... but that was true of the Vista box as well, so I don't see what difference it would make.

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