Looks like there's already a fix for this, although not official. It requires using ResEdit to add a resource, a fairly trivial fix. You can read it here:
<a href="http://www.maccentral.com/macos/?read=897"> http://www.maccentral.com/macos/?read=897</a>
Download the USB SDK 1.2 from Apple.
Move the three extentions from the "Extensions-AppleBuilt" folder into your system folder.
Open the "USB Support" extention with ResEdit.
Add a new resource of type usbx.
The default id is 128, change it to 1984.
Save the changes and reboot.
Happily use all your USB devices again.
Macintosh, what a great community!
[This message has been edited by Rudy Rugebregt (edited 05-12-99).]