This is really strange. Leave it to me to screw something up.
I have Google set as my home page. When I open IE7 the window immediately maximizes. No top bar, no status bar. Nothing. It is a true full window.
Interestingly enough, if I do a search and open the result in a new window, everything is restored. If I go back to google, I get the full window again.
It's early Saturday morning but I hope someone can help me out with this because it's really starting to piss me off.