unhappy store filter on integers

[dishwashwebdesign]

funny things are happening after the update from sencha 2.0.0 to 2.0.1.
this store filter did the job nicely when filtering on integer-ids:

itemStore.filter({
           filterFn: function(item) { return item.get("categorytreeid") == categoryId; }
});

after the upgrade this doesnt work anymore, no items will be retrieved with this function.

if filter is set like this:

itemStore.filter('categorytreeid',  categoryId, false, true);

and value is 1, all items including 1 will be retrieved (10, 11, 121, etc).

please, any help!
did the little sencha upgrade messed it up?
thanks for any hints!

[dishwashwebdesign]

dont worry guys,
solved it using non-integer ids (1a to how high ever
then it works just smoothly...