Override findAll fails

I encountered strange behavior when overriding can.model's findAll. I need to assign findAll to a variable because it gets called generically. Anyway, here's the problem:

1. // App.Models.User
   
2. findAll: function( filter, success, error ){
               return $.ajax({ ... });
3. }
4. ...
   
5. App.Models.User.findAll({}, function(){}, function(){}); -> SUCCEEDS
6. var finder = App.Models.User.findAll;  // Assign to variable
   
7. finder({}, function(){}, function(){});  -> FAILS but should not!
   

Now, if I just rename findAll method to findAllFunky, it succeeds:

1. var finder = App.Models.User.findAllFunky;
2. finder(...);  -> SUCCEEDS
   

What's going on here? Do these methods get "special treatment"? Btw, this works perfectly in jquery MX's Model.