Hi Max,
_Subdiv_beta4 don't work for me on V3 MACSOX
I put the command _Subdiv_beta4 with Tab key but the panel Subdivision don't stay visible.
i've tested with skull and elephant
but in Moi if I put a solid Box and run the command _Subdiv_beta4, it's OK.
I think it's a matter of Mac and Memory.
Thanks