I use IE, and have no problems. If you open the browser and go to the home page, it doesnt show you are logged in. Once you click on any of the links though, you are logged in.
For example: if I just go to www.thechicagogarage.org its the standard white skin and doesnt show me as logged in. I usually just go to "todays posts" first thing and when the page loads it goes to the skin I have set and I am logged in.