Lots of name issues on Omnom lately. Could somehting be off or could it be due to when Yeong logged in from the same browser as BalancedFury then causing things to mess up? That said the only time I ever got able to get highlighted with gues was when I logged out then opened OmnomIRC-Full (remembering the URL) after restarting my browser
Btw, from experience, clearing cookies doesn't fix everything. Sometimes a browser restart, along with clearing cache, is needed. I even remember one case where I had to reboot my computer.