Connecting USB Hub doesn't connect some devices (randomly)

I have quite a few USB devices (normally 5: external Apple Modem, mouse, ext. Apple keyboard, 2 printers), which I plug into a USB 2 hub (externally powered D-Link DUB-H7). When I bring my MBP back to my desk, I plug the hub into one of the ports on my MBP.
In theory, this should connect all of my devices. In practice, it connects only some of them, and which ones it connects seems to be completely random. Sometimes just two, sometimes all of them. Sometimes the keyboard and not the mouse, sometimes vice-versa, and sometimes neither (both plug directly into the hub - I'm not using the keyboard hub).
If I unplug and re-plug the main cable - I get another set of devices. If I unplug the cable to an unrecognized device and re-plug, it is then recognized.
As you might imagine, this is a PITA.
I have tried:
- running USB Prober, including logging. This confirms that the non-working devices aren't recognized by the system at all, until I re-plug. The logging doesn't tell me anything that I can make use of.
- installed the debugging USB kext (http://developer.apple.com/hardwaredrivers/download/usbdebug.html). This makes the USB Prober log give more information, but still doesn't tell me anything that helps. If this causes writing to some other log, I can't find it.
- replaced the hub with an identical, brand new hub. No difference.
- replaced the main USB cable with another USB 2 certified cable. No difference.
Looked at the console and system logs. There are some USB-related errors, but nothing unusual happens at the point of connecting the hub. There are msgs from USB Prober, but I get these even when (successfully) unplugging and re-plugging a single device. E.g.
2007-09-20 22:54:41.651 USB Prober[510] USB Prober: USBDeviceOpen() failed 0xe00002c5
2007-09-20 22:54:41.652 USB Prober[510] USB Prober: USBDeviceOpen() failed 0xe00002c5
2007-09-20 22:54:50.975 USB Prober[510] USB Prober: USBDeviceOpen() failed 0xe00002c5
2007-09-20 22:54:50.975 USB Prober[510] USB Prober: USBDeviceOpen() failed 0xe00002c5
2007-09-20 22:54:51.412 USB Prober[510] USB Prober: USBDeviceOpen() failed 0xe00002c5
2007-09-20 22:54:51.412 USB Prober[510] USB Prober: USBDeviceOpen() failed 0xe00002c5
2007-09-20 22:54:51.934 USB Prober[510] USB Prober: USBDeviceOpen() failed 0xe00002c5
2007-09-20 22:54:51.934 USB Prober[510] USB Prober: USBDeviceOpen() failed 0xe00002c5
2007-09-20 22:54:52.467 USB Prober[510] USB Prober: USBDeviceOpen() failed 0xe00002c5
2007-09-20 22:54:52.467 USB Prober[510] USB Prober: USBDeviceOpen() failed 0xe00002c5
2007-09-20 22:54:52.954 USB Prober[510] USB Prober: USBDeviceOpen() failed 0xe00002c5
2007-09-20 22:54:52.954 USB Prober[510] USB Prober: USBDeviceOpen() failed 0xe00002c5
2007-09-20 22:54:53.254 USB Prober[510] USB Prober: USBDeviceOpen() failed 0xe00002c5
2007-09-20 22:54:53.254 USB Prober[510] USB Prober: USBDeviceOpen() failed 0xe00002c5
So, any ideas on what this problem is, or how to track it down? The behavior is as if there are two many device-connection events happening in too short a time, and some of them are getting dropped. If so, could be an OS problem. But, that seems pretty basic.
I'd be glad to provide more detailed logs, if someone can specify what to log.

Hi all (esp. Carolyn). I bought a new hub (BelkinUSB 2.0 7-Port Economy Hub http://www.buy.com/prod/belkin-usb-2-0-7-port-economy-hub/q/loc/101/202378584.ht ml ), and my problems are gone.
I did more searching (I had done a lot already), and found a single comment on newegg by someone having similar and worse problems - same D-Link hub, and also on a Mac, though the 2 other Mac users had no complaints.
http://www.newegg.com/Product/ProductReview.aspx?Item=N82E16817111402&SortField= 0&SummaryType=0&Pagesize=100&SelectedRating=-1&=0&=100&Page=
Some other users of this hub had problems also, on PC's as well, though most had none.
Unfortunately, now I'm stuck w/2 junk hubs (warranty has expired). At least my problems are gone!
Message was edited by: ruftytufty

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