I've installed Internet Explorer 7 RC 1 on my machine, so far haven't experienced major issues except that it took me a hard time to notice where the refresh button was because it looked so small compared to the old version...plus the fact that it got separated from the next/back arrow buttons.

:D I do like the sleek look and feel of the buttons...the tabbed browsing...have yet to explore other new features :D

COOL :)