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Hi Jimbo, A return in an Error 500 could be because the request you placed went over a certain limit in place.  Most likely due the amount of links pointing at nz.yahoo.com is the reason you got the error.   I would suggest you email out help team if you are experience any further problems, at help@seomoz.org. Casey

Hi Jimbo, did you get those sorted out, or are you still having a problem? If you're having a problem, the best bet is to email help@seomoz.org and create a ticket there.