I'm not sure what it is, but the new top bar just *feels* cramped.

The font is kind of thick, and that makes it look smaller. You're shoving more icons on there, half of which are more confusing than just a plain text label, so that's also more cramped. 

The proportions just feel way wrong. The old bar felt a lot cleaner.

##End review: =(

FWIW, I also am way less likely to go to review now, because it's smudged off right, and I have to think about which icon it is, and *ugh*.

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EDIT: Just noticed the Area51 top bar is not changed. That's going to make this even harder to get used to...