[jQuery] 1.3 :not(:first) selector

[comslash.com]

I just encountered a problem when using the :not(:first) selector in
1.3 .  Can i get a confirmation on if this is a bug, or should I write
this differently ?

// Does Not Work Now
$('.class1>.class2>div:not(:first)').each(function(){ $(this).hide
(); });

// Works With Full Selector
$('.class1>.class2>div:not(.class1>.class2>div:first)').each(function()
{ $(this).hide(); });

Thank You