GetSubwebsForCurrentUser return only 50 subsites

I've been lookinganddefaultSharepoint 2007and 2010brings adefault limitof50subsites.

If modifiedsomeentriesin web.configandaddthe tagDynamicChildLimit= "0"I note thatinthe navigation menutoappearall subsitesand the limitation of50displayed.

Mysurprise comesin a customwebpartwherewelist alllist all subsitesand displayedonly50.

Anyone knowif there islimitation in thiscode?

Dim webs As SPWebCollection = web.GetSubwebsForCurrentUser()
Dim nodes As SPNavigationNodeCollection = web.Navigation.QuickLaunch