I'm really suprised at this ( Sorry about the byte code )

PHP Code:
/*
if (score==500){
    trace("true");
} else {
    trace("false");
}
*/

    push 'score'
    getVariable
    push 500
    equals
    not
    branchIfTrue label1
    push 'true'
    trace
    branch label2
   label1:
    push 'false'
    trace
   label2:


/*
(score==500 ? trace("true") : trace("false")) 
*/

    push 'score'
    getVariable
    push 500
    equals
    branchIfTrue label3
    push 'false'
    trace
    push UNDEF, UNDEF
    branch label4
   label3:
    push 'true'
    trace
    push UNDEF, UNDEF
   label4:
    pop 
Why does Flash push UNDEF on the stack and then pop it back off ? ( I tested it with defining var score=50 and it still produced the same output ).

Is it just a Flash quirk or am I being really stupid ? It seems strange that (condition ? action : else) generates more ( And from the looks of it, junk ) byte code than the long hand way ?
OK, you can edit it by hand and save the "NOT" statement, but...

Squize.