I'm not quite sure YJ pop up module is causing this but it might be related to the issue: Two white bands appear above and below my logo when logged in. I have tried to play w/ the .css files but not luck (though I am able to set the header a the right place either when logged in or logged out but it is only working fine in one of the states).
I do not know if it is clear or not but it probably will make more sense if you look at the actual site logo and try to login:
Also something else that I have noticed is that the white bands that appear above and below the logo when logged in are of different format in Chrome/Firefox/IE.
Once again thx for your help, I have been asking all over and haven't been able to solve the pb so far. This is the first major issue I am facing w/ template formatting and I'd really appreciate any suggestion to fix this pb.