future of linuxcnc

have flashed the 5i24 card on debian wheesy machine,
have used hostmot2/5i24_16_svst1_4_7i47s.bit on debian wheesy machine no problem,
but when try to work Pncconfig Wizard on debian strech computer got following error:
PNCconf encountered an error. The following information may be useful in troubleshooting:

Traceback (most recent call last):
File "/usr/bin/pncconf", line 2901, in on_mesa_component_value_changed
self.set_mesa_options(boardnum,title,firmware,numofpwmgens,numoftppwmgens,numofstepgens,numofencoders,numofsserialports,numofsserialchannels)
File "/usr/bin/pncconf", line 2944, in set_mesa_options
currentboard = self.d["mesa%d_currentfirmwaredata"% boardnum][_PD._BOARDNAME]
TypeError: 'NoneType' object has no attribute '__getitem__'

That may be a pncconf/stretch bug of some kind (does pncconf even support the 5I24?)