IE msg: A Runtime Error has occurred. Line: 115 Error: 'style_cookie_settings' is undefined

Firebug msg: style_cookie_settings is not defined
[Break on this error] document.cookie = name + '=' + value + expires + style_cookie_settings;
styleswitcher.js (line 115)

Happens any time a popup page needs to reload data. Example: pm->compose->find a member->select any letter for member names