Many ExpatErrors from checkwatches

There are tons of ExpatErrors coming out of checkwatches when
connecting to remote Bugzilla instances:

{{{
 606 ExpatError: mismatched tag: line 101, column 4
   Bug: https://launchpad.net/bugs/661441
   Other: 606 Robots: 0 Local: 0
     29 http://bugs.distributed.net/ (Unknown)
       OOPS-1863CCW1015, OOPS-1863CCW1152, OOPS-1863CCW1639, OOPS-1863CCW1784, OOPS-1863CCW186
     29 http://bugs.ntp.org/ (Unknown)
       OOPS-1863CCW1115, OOPS-1863CCW1294, OOPS-1863CCW13, OOPS-1863CCW148, OOPS-1863CCW1748
     29 http://bugs.pearsoncomputing.net/ (Unknown)
       OOPS-1863CCW1117, OOPS-1863CCW1297, OOPS-1863CCW15, OOPS-1863CCW150, OOPS-1863CCW1750
   [18 other URLs]

 290 ExpatError: mismatched tag: line 71, column 4
   Other: 290 Robots: 0 Local: 0
     29 http://acpica.org/bugzilla/ (Unknown)
       OOPS-1863CCW1109, OOPS-1863CCW1263, OOPS-1863CCW142, OOPS-1863CCW1741, OOPS-1863CCW1922
     29 http://bughost.org/bugzilla/ (Unknown)
       OOPS-1863CCW1012, OOPS-1863CCW1148, OOPS-1863CCW1620, OOPS-1863CCW1781, OOPS-1863CCW183
     29 http://bugs.async.com.br (Unknown)
       OOPS-1863CCW1106, OOPS-1863CCW1258, OOPS-1863CCW139, OOPS-1863CCW1738, OOPS-1863CCW1919
   [7 other URLs]

 144 ExpatError: mismatched tag: line 87, column 4
   Other: 144 Robots: 0 Local: 0
     29 http://bugs.linuxbase.org/ (Unknown)
       OOPS-1863CCW1114, OOPS-1863CCW12, OOPS-1863CCW1290, OOPS-1863CCW147, OOPS-1863CCW1747
     29 http://bugs.linux-foundation.org/ (Unknown)
       OOPS-1863CCW11, OOPS-1863CCW1113, OOPS-1863CCW1289, OOPS-1863CCW146, OOPS-1863CCW1746
     29 http://issues.apache.org/bugzilla/ (Unknown)
       OOPS-1863CCW1105, OOPS-1863CCW1257, OOPS-1863CCW138, OOPS-1863CCW1737, OOPS-1863CCW1918
   [2 other URLs]
}}}

I cannot replicate these problems locally, and there is not enough
instrumentation in checkwatches to see what exactly is going wrong.