I haven't been (Cannith) crafting much lately. But tonight, I got a weapon with an augment slot on one character that would go well with another character. Disjuncted it, added crafted shards to it (bound shards) - and suddenly realized the weapon was bound to character!
When did that happen? I don't think the weapon was dropped as bound - I never got the 'bound' message popup. What made it become bound? Last time I checked, bound shards were bound to account, not character. Does it have to do with disjuncting an augmented item?