Is there a difference between (function() {...}()); and (function() {...})();?

Possible Duplicate:
Location of parenthesis for auto-executing anonymous JavaScript functions?

Sometimes I see:

(function() { ... }()); 

and sometimes I see:

(function() { ... })(); 

I see both forms with and without arguments. They both execute the anonymous function.

Is there a difference between the two forms? Are there any compelling reasons to use one form over the other?