in the current newbb/viewtopic.php
if ($total_posts > [b][color=CC0000]50[/color][/b]) {
$viewmode ="[b][color=CC0000]flat[/color][/b]";
...
if ($total_posts > [b][color=CC0000]50[/color][/b]) {
$viewmode ="[b][color=CC0000]flat[/color][/b]";
...