I am using the Zen page theme and latest version. I have created a Page for a way to return to the main site and have listed it first on the menu.
Using Firefox, either of these three addresses, results in reaching the correct page.
3. http:// (etc)
In using Chrome, if I use #1 or #3 above I reach the menu, but the page link at the top is there, but is no longer a hyperlink.
Using #2, it is there.
I don't have IE anymore to know how that is reacting.