Perspective Changing

I'm not sure if this a bug or not, but it is something that I would like changed. In the 1.2 version whenever I type a command or search for an item in the recipe book and have to type an "e", because that is the key I have for F5 mode, my perspective changes. This never used to happen before, but it really ticks me off whenever I'm playing in a server and that happens right before a PvP duel or when the game starts and I have to change it back.