Actually I´m using Version 1.2.1.
Pulverizer are crushing cobblestone to sand and byproduct is gravel, instead of gravel and byproduct sand. The same at gravel: crash into flint, byproduct: dust.
edit:
downgrade 1.2.0:
the same issue
edit2:
downgrade 1.1.9:
ok. but BigReactor-Issues