A 'Thompson out' banner was unfurled and his decision to replace Spencer
It had all seemed so different at the start when Notts began brightly but, once again, their failure to find the net when on top was to cost them dearly.
They had a great chance early on but Jim Provett distinguished himself with a great double save, first to deny debut boy Danny Crow and then from the rebound to turn Weir-Daley's follow up around his upright.
Bury sharpened up their act and ex-Notts striker Glynn Hurst headed home on 31 minutes only to be penalised for a push.
But four minutes later, Bury struck with an unstoppable piledriver from Steve Haslam.
The second half was a disjointed affair in which Notts were offered a lifeline with a 64th minute penalty which Neil MacKenzie converted with conviction.
However, in that incident, Crow sustained a suspected broken metatarsal
Within three minutes, Bury were in front again when some slack defending gifted a goal to Paul Scott.
In added time, Adam Tann completed a miserable afternoon by fouling Hurst and Nicky Adams clinched Bury's three points from the spot.
It means Notts have conceded nine goals in the three defeats in a row.
They can, however, point to some hard luck with a long list of injuries to which, as well as Crow, Jason Lee has been added with a broken right forearm accidentally sustained in training.