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Hey Frank! This definitely sounds like an issue with relative links on the page; if the crawler sees it, he'll follow it, and continue to do so indefinitely, causing a super-long URL with the same sub-page listed over and over in the URL. I actually see this bug a fair amount. I'd recommend you look at your page code, try to find relative link tags, and then fix them on that side of things. If you think it's a bug and nothing in your code, you can always send an email to us at help@seomoz.org - we'll be able to take a look and make sure it's not a bug on our side (make sure to send your PRO email address, the campaign with the issue, the URL with the issue, and any relevant screenshots/examples to help us diagnose). In my experience, though, this is always because of a relative link I find in the source. If you need help with how to fix that, you may want to start another thread here in the Q&A and post your page's source or URL. Hope this helps!