I realize that this was considered a bug fix; However, a large number of player skins used this as a feature. The picture I have attached to this report is an example. If a player using this skin or a similar one were to sneak in a version before 1.4.2, the glasses would cover their eyes, as the skinmaker intended. On the other hand, in 1.4.2 and 1.4.3pre, the glasses will remain under the player's eyes when they sneak.