Steps to reproduce on SP11 and SP13:
- Install vanilla Liferay/Tomcat bundle
- Create an additional page named "login" (no content necessary, just an empty page)
- Navigate to login page
- Click "Sign in" in Dockbar
- Expected result: Sign-in dialog pops up.
- Actual result: See attached screenshot
Note: It gets worse when you remove the sign in portlet from welcome page...