In Index_whosonline
<tr>
<td class="tcat" colspan="2"><span class="smalltext"><strong>{$lang->whos_online}</strong><a href="online.php">{$lang->complete_list}</a></span></td>
</tr>
<tr>
<td class="trow2" width="10%"><span class="smalltext"><img src="http://www.google.pt"</img></span></td>
<td class="trow1" width="90%"><span class="smalltext">{$lang->online_note}<br/></span></td>
{$onlinemembers}

<tr>
<td class="tcat" colspan="2"><span class="smalltext"><strong>{$lang->whos_online}</strong><a href="online.php">{$lang->complete_list}</a></span></td>
</tr>
<tr>
<td class="trow2" width="10%" colspan="2"><span class="smalltext"><img src="http://www.google.pt"</img></span></td>
<td class="trow1" width="90%" colspan="2"><span class="smalltext">{$lang->online_note}<br/></span></td>
{$onlinemembers}
As I said it a PM to you, you could have found the answer to this with a search, this is asked so many times.
That's because you didn't give the code for the group legend bit
In your Global Templates, find the template for the group legend, and add colspan="2" to both <td> tags.
o_o
http://i43.tinypic.com/33u4jef.jpg
usergroup_legend
Didn't Work, in Global/usergroup_legend
<tr><td class="tcat"><strong>Group Legend</strong></td></tr>
<tr><td class="colspan="2"></td></tr>
<tr><td class="trow1">{$usertitles}</td></tr>
Not sure where you've got that from... you seem to have added a new table row, put the colspan="2" into a class and not put it where it needs to go...
Use this...
<tr><td class="tcat" colspan="2"><strong>Group Legend</strong></td></tr>
<tr><td class="trow1" colspan="2">{$usertitles}</td></tr>
Thank this solved The Group Legend...
But not the Who's Online, Who has been online today
Just do the exact same thing but with the template for that plugin too.