I don't see a problem here. Here is code that does what I think you are describing:

o1 = crea('cls1')
o2 = crea('cls2')
o1.mymethod()
o2.mymethod()
return 
DEFINE CLASS cls1 as custom
	procedure mymethod
		lparameters tcParm
		? Program(),pcount() && this = 0
	endproc
enddef

DEFINE CLASS cls2 as cls1
	procedure mymethod
		lparameters tcParm
		?Program(),pcount() 
		dodefault(tcParm)
	endproc
enddef

I get this output in VFP8, and back to VFP5. It looks like design behavior to me. After all, you did pass parameter with the DoDefault() function.

CLS1.MYMETHOD 0
CLS2.MYMETHOD 0
CLS1.MYMETHOD 1

If you are referring to something different, please modify my code above and repost it to demonstrate.

Thanks!

>I am seeing different behavior with pcound(). If I call a method with a parameter directly all works well. If I subclass the method and put in a dodefault(), pcound() returns a 1 even though I don't pass a parameter. For example:
>
>

>this.mymethod()
>
>* mymethod
>lparameters tcParm
>? pcount() && this = 0
>
>
>this.mysubmethod()
>
>* mysubmethod
>lparameters tcParm
>dodefault(tcParm)
>
>* mymethod
>lparameters tcParm
>? pcount() && this = 1
>
>