[Pharo-dev] Losing instance variable addition

Hi guys we are losing instance variables addition when loading a package. Here is the example: Gofer new url: 'http://smalltalkhub.com/mc/gisela/Flamel/main'; version: 'Flamel-GiselaDecuzzi.94'; load Normally RBProgramNode should have three new instance variables and not this is not the case. Is it a known bug? Stef