Replication - replicated & failed at the same time?

[Stefan Matheis]

Hi Guys,

while working on the UI for Replication, i've got confused sometimes 
because of the following response (from /replication?command=details):

<?xml version="1.0" encoding="UTF-8"?>
<response>
  <lst name="details">
    <lst name="slave">
      <!-- .. -->
      <str name="indexReplicatedAt">Sat May 14 16:25:53 UTC 2011</str>
      <arr name="indexReplicatedAtList">
        <str>Sat May 14 16:25:53 UTC 2011</str>
      </arr>
      <str name="replicationFailedAt">Sat May 14 16:25:53 UTC 2011</str>
      <arr name="replicationFailedAtList">
        <str>Sat May 14 16:25:53 UTC 2011</str>
      </arr>
      <!-- .. -->
    </lst>
  </lst>
</response>

To reproduce that: Start with Solr-Instance (with a clean index), 
trigger replication, abort fetch - look at the details.

Does not really make sense to me? If it's okay .. please let me know: 
how & why - especially interested in how to display that information in 
the UI (Current State: http://files.mathe.is/solr-admin/10_replication.png).

Regards
Stefan