Because I like the comfort of familiarity, and hate change or surprises? It's a reasonably common personality trait among programmers (I can put a medical label on it if you want). When I first saw it I spent a while trying to figure out what was wrong with my browser.
Ultimately I don't see why that matters though; understanding why it's bothering me isn't going to make it not bother me.
Ultimately I don't see why that matters though; understanding why it's bothering me isn't going to make it not bother me.