Found a bug that allows some white items to be duplicated when putting them into a crafting grid with soap. For example, if I take 64 white wool and 64 soap, the result is 64 white wool, but it only consumes 1 of each from the crafting grid, so I end up with a total of 127 white wool and 63 soap. I can also confirm that this works with white cables from AE2, but I haven't done extensive testing to see what else this works with. Playing on version 1.5.0.
#Item Duplication Glitch with Soap
stray shadow
static zinc
Sounds like strong soap.