Login has probably expired, when you create a new page (only in Safari and Internet Explorer)
When you create a new page you will become the failure
Your login has probably expired.
Do you want to refresh it now?
When you press OK, it shows the popup-window with the logedin user. Not the form to log in, only the username. The page will not create in the page tree.
When you press Cancel, the page will create in the page tree.
In Firefox is the behaviour normal.
Safari 3.0.4 (5523.10.6), Mac OS X 10.5.1
(issue imported from #M7184)