Invalid html like what TimberFloor AU quoted and like this will do strange things in different browsers:
HTML Code:
<if condition="$show['pmwarning']"><div><strong><phrase 1="$vbphrase[pmpercent_nav_compiled]">$vbphrase[your_pm_box_is_x_full]</phrase></strong></div></if>
</div>
</td>
</tr>
<else />
<tr><td class="alt2" style="background: #c9e9c9 url(images/zoovix/misc/link_background_green.gif) repeat-x top left;width:250px;"><div class="smallfont">
<b>Welcome</b>, Guest. (<a href="clogin.php">login</a> - <a href="register.php">register</a>)<br />Please login or register for all of the regular member forum features.
</div></tr></td>
</if>
</tr>
</table>
</table>