Not sure if $taboo was getting sanitized or not. Possibly an SQL injection vulnerability that allows maliciously crafted group names to inject SQL at a later date when the group CP is loaded. Unconfirmed, theoretical fix.

// UK lang variables

tinyMCE.addToLang('',{
iespell_desc : 'Run spell checking',
iespell_download : "ieSpell not detected. Click OK to go to download page."
});