[christon26]

It's either the panel or panel surround declarations which are found in your Style Manager - All Style Options or the vBulletin Editor declaration which is in a css file, clientscript\vbulletin_editor.css:

.vBulletin_editor
{
border: 2px groove;
}

Change to suit.

It's hard to tell exactly which one it is without looking at your site lol if you use Firefox, Firebug is really good to see what css you need to change