We have perennial problems with fines due to the fact that fines don't link back to check-outs... now that we've added issue_id, we should add a linking field in accountlines, and use that wherever it's possible in the fines code (for example, fines.pl should try to link to issue_id, and only fall back to reading the description if issue_id is NULL).
*** This bug has been marked as a duplicate of bug 15675 ***