i dont think theyre as buggy as people make out. i havent had a poser crash in eons.
sure there are some program quirks but if you know what you are doing and experienced in the program they dont affect you negatively.

i wouldnt call poser 5 or poser 6 'unstable'. keep in mind itsmostly poser newbies asking for help with the program in the forums.... look in any program forum - max, lightwave, etc and youll see the same.

i would be perfectly happy with poser 7 if the only change they made was to redo the rigging to an industry standard. the resulting poser figures would blow you away, and make you wish you had asked for better rigging half a decade ago. besides, there are so many untapped P6 features right now that are nowhere near being used to their potential - the firefly renderer, cloth room, hair room, displacement mapping, etc that we hardly need more right now.