Bread-Bakers v102.n028.14

Chris Dalrymple writes:
 >Everything is chugging along in the mixer, the dough is almost perfectly
 >kneaded, and then the dough breaks down into a gloppy mess.

Sounds like your dough was well past the perfectly kneaded stage. How long 
were you mixing it? It has ben my experience that putting potato flakes in 
the dough makes it take less time to knead. Try mixing for a shorter time 
and see if the dough can form a windowpane.

Ben McGehee