When attempting to delete a page that no longer exists, there's a message to the effect "Could not delete the page or file specified. (It may have already been deleted by someone else.)"

This is displayed in plain text formatting, which doesn't look very error-y. If you're not paying attention, it doesn't look that much different from the success message.

It would probably make sense to mark at least the initial part using the error/warning class (big red text) for consistency with other errors. The later explanatory text ("may have been deleted by someone else") can be left in plain text.

(Customized text on for instance English Wikipedia goes on to add a bunch of other links after this as well. We definitely wouldn't want to just wrap the existing message in a <div class='error'>)

Version: unspecified
Severity: enhancement
URL: http://en.wikipedia.org/wiki/FDSLKjfsdlkjsfd?action=delete