UBB.Developers Forums UBB.threads 7 Development How Do I? Error log entry

I looked at the "View error logs" in the DB Management section of the CP tonight and noticed a very long list of items dating back to 2003. With the exception of the IP for each item, the error was exactly the same:
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/forum/showthreaded.php

Unable to do_query: SELECT B_Number,B_Main,B_Subject,B_Posted,B_Approved FROM w3t_Posts WHERE B_Topic = 1 AND B_Board = 'new' AND B_Approved = 'yes' ORDER BY B_Sticky DESC,t2.U_Username DESC LIMIT 12 - Unknown table 't2' in order clause
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So, what is this about? Is there something I need to change/fix? If so, how do I do it?

Not sure if that's a mod or a bug - but the query is wrong.

The t2. shouldn't be in there.