With both my raid groups using the ghastly eye bowl food that doesn't give a health bonus, our health bars are slightly smaller than what I'm used to, and on Lokkestiiz, there's a small debuff which decreases your health by 1000 or so, making the healthbar even smaller.
Here is a picture a friend of mine took during raid, on my screen it is even smaller, maybe due to DarkUI.
This really bothers me as I can't quite determine how much health I have and if I need to keep using a shield during the beam phase of the fight, is there an addon out there that locks the healthbar to a certain size but still retains the vanilla style of them? bonus points if you can configure if you want regular size (no food) or bigger size (with health food).