M&M: Heroes VI - v1.2.1. Patch
Patch 1.2 introduced a bug in which it was possible that an achiement could be copied from one user to another by using the Compared Profile feature. Patch 1.2.1 fixes this issue, which only affected player achievements and no other parts of a player's profile.
Source: Blues News
Information aboutM&M: Heroes VI
SP/MP: Single + MP