Toolbars not working with IE?

Here's what I've got:

FCKConfig.ToolbarSets["Notes"] = [
        ['Bold','Italic','Underline','StrikeThrough'],
        ['-','JustifyLeft','JustifyCenter','JustifyRight','JustifyFull','-','About'],
        '/',
        ['Style','FontFormat','FontName','FontSize','TextColor','BGColor']
] ;
FCKConfig.ToolbarSets["Questions"] = [
        ['Bold','Italic','Underline','TextColor','UnorderedList'],
        '/',
        ['FontSize']
] ;
FCKConfig.ToolbarSets["Basic"] = [
   ['Bold','Italic','-','OrderedList','UnorderedList','-','Link','Unlink','-','About']
] ;

Basic and Notes come through just fine, and Questions works on Firefox.

On IE, however, I get "Toolbar set 'Questions' doesn't exist!"

Any tips? Did I make a dumb syntax mistake or something? I can't see how, since that would cause it to crash in both browsers...