I'm using Eclipse and was experimenting with WebDriver, DBunit, Maven and the likes. One fine moment I needed to add a Reference Library (right click project > Properties > Java Build Path), and I'm suddenly getting the error "The currently displayed page contains invalid values." :(
Any ideas? I've already re-installed Eclipse and re-instated my workspace but the problem occurred again.
As per comments Mars is under development and dates for release on 24th June 2015. I had no idea and haven't had issues in the past 3 months working on small stuff. To answer my own question though, all I did to solve the issue was go to "Help > Check for Updates" and this seems to have solved this specific issue for the time being. Thanks all!