Here is a throbber removal tool.http://toastytech.com/evil/lab.html#throboff
It worked perfectly and is reversible.Didnt even have to unzip it,just opened it and clicked on the appropriate file(there are a couple of options so read the readme.
I know throbber support has been added to WB and SS but for those skins that dont include one(all of mine

),this is a nifty tool.
Once the throbber is gone(no reboot necessary),just reset your toolbars.