Hey, I believe it's the bold area below:
Code:
<div class="smallfont">
<div style="white-space: nowrap"><phrase 1="$recordusers" 2="$recorddate" 3="$recordtime">$vbphrase[most_users_ever_online_was_x_y_at_z]</phrase></div>
<div>$activeusers</div>
</div>
Admin CP -> Styles & Templates -> Style Manager -> {Style to change} -> (drop-down) Edit Templates -> Forum Home Templates -> FORUMHOME