Here's a screendump from ubbcentral to show what I mean.
It seems to be a small bug in /scripts/showflat.inc.php
Find 1/3 down the page this codesnippet in /scripts/showflat.inc.php
if (!$page) { $page = 1; }
if ($gonew && !$nt) {
$nt = $page;
}
Edit code to:
if (!$page || $mode == "showthreaded") { $page = 1; }
if ($gonew && !$nt) {
$nt = $page;
}
All topics might be displayed in threaded mode (if enabled in CP)