[Xoligy]

That's because you're setting their post count to 10 rather than comparing it. If you want to show it only when they have exactly 10 posts you need to use == like so:

<if condition="$vbulletin->userinfo['posts'] == 10">

However if you want to show only if they have more than 10 posts you need to use > like so:

<if condition="$vbulletin->userinfo['posts'] > 10">

..and to show only if they have less than 10 posts you use < like so:

<if condition="$vbulletin->userinfo['posts'] < 10">