The initial message retrieval from NNTP is not working properly in gateway.php.
When the NNTP server replies that the min. msg index is 1 and the last fetched msg is 0, the code decides to use 1 (min) for lastmsg then iterates from lastmsg+1 to max.
To fix the problem, I changed this line of code:
$lastmsg = ($group['lastmsg'] >= $news->min()) ? $group['lastmsg'] : $news->min();
To this:
$lastmsg = ($group['lastmsg'] >= $news->min()-1) ? $group['lastmsg'] : $news->min()-1;
David