Topic: Wrong username and/or password
It would be handy to have a Go back or Try again link rather than using the Back button.
"Wrong username and/or password.
If you have forgotten your password request a new password to regain access."
Re: Wrong username and/or password
The message will be displayed in the form as opposed to on a new page.
Still, providing a go back link is not good design. That's trying to reproduce browser behavior in markup. People know how to use the back button.
"Programming is like sex: one mistake and you have to support it for the rest of your life."