Icons on the right are fairly light grey, they can almost look as if disabled. Also, the refresh/stop icon is darker than favorite/pull-down, which makes it look inconsistent (although I guess the intent to make it more prominent makes sense). IMO the contents look rather cramped, perhaps a little more vertical whitespace (particularly on the bottom) would be better.
I notice that on Windows 7, the icons on the right-hand side *do* have hover effects, so I guess this might be specific to OS X?
I've started to get used to the look, but the lack of a hover effect for the refresh/favorite/pull-down widgets on OS X (as opposed to Windows 7) still makes me doubt the effect of the action. Could someone take a look, please?
Same problem on ubuntu: there is no longer a hover effect for the icons. Another problem is that they stand out too much, which has the opposite effect from the work being done to remove unnecessary colours from the search bar (Bug 592909). Maybe they should use the -symbolic version of the icons (monochrome). I can open a new bug about this ubuntu-specific problem, if you think it is a valid point.
I guess this bug is obsolete/WONTFIX with Australis?