Description of problem:

Odd entries related to external trackers are making it into the history. I haven't tried to reproduce the problem, and I don't exactly know what's causing it, but I've found three bugs where this is the case:

$VAR1 = {
          'added' => '',
          'attach_id' => undef,
          'bug_id' => '630990',
          'bug_when' => '2010-10-20 11:30:27',
          'fieldid' => '76',
          'removed' => 'https://access.redhat.com/show_bug.cgi?id=00320418',
          'who' => '174484'
        };
$VAR1 = {
          'added' => '',
          'attach_id' => undef,
          'bug_id' => '499874',
          'bug_when' => '2011-02-02 03:39:10',
          'fieldid' => '76',
          'removed' => 'https://access.redhat.com/show_bug.cgi?id=00358403',
          'who' => '266078'
        };
$VAR1 = {
          'added' => '',
          'attach_id' => undef,
          'bug_id' => '672138',
          'bug_when' => '2011-02-03 07:19:24',
          'fieldid' => '76',
          'removed' => 'https://access.redhat.com/show_bug.cgi?id=00408969',
          'who' => '200676'
        };


"https://access.redhat.com/show_bug.cgi?id=" is not a valid url for any tracker, and while it seems to have deleted the BZ<->SFDC association in Bugzilla, it does not seem to propagate the deletion through to SFDC.

I can only speculate that these requests were sent via xmlrpc, as I don't see the UI allowing this, though I'm not entirely certain. If so, such requests should simply be rejected, i.e. nothing should happen. Unless the url has the right format, it should not trigger a deletion of an external tracker. Equally, irrespective of how the request is issued, all history entries relating to the deletion of external trackers should have the same format, and the "removed" entry should read "Red Hat Customer Portal <id>".