Why does this jQuery dropdown menu display subcategory selections only for certain top-level categories?
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                chunkymonkey
            
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        Published on 2010-12-27T19:45:23Z
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I'm trying to implement a dropdown menu based on a jQuery plugin from Filament Group:
http://jsfiddle.net/chunkymonkey/Pr8k4/
What I am having difficulty fixing is a bug where certain categories can be expanded to show their subcategories while others show nothing when opened up.
For example:
- Alternative Rock can be expanded to show its multiple subcategories . . . BUT . . .
 - World Music, 
which has equally many subcategories, shows no subcategories when expanded. 
I would be very grateful if anyone could help me figure out what's causing this. Thanks.
UPDATE: Just noticed this problem may be Chrome-specific(??). I just tested it in IE8 and Firefox and it seems to work correctly in both.
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