instead of this being out here under the module, i've created an issue for this:
http://www.ubercart.org/project_issue/white_screens_after_enabling

it was hard to find because when you create an issue, there's a project dropdown...when you first choose, it says Chained Attributes, but then under the body of the issue you have to choose project again (what's up with that anyway, UC admin folk?) and it is listed there as "Links attribute options"