validation_errors() returning an empty string after upgrading to 2.1.0

[eluser]mcryan[/eluser]
You can't just use a single 2.1.0 file with a 2.0.2 installation. Follow the upgrade instructions. Essentially you replace your entire system folder and you'll have to add a few config files. The only reason I was having a problem is because I extended a helper and needed to make some changes in there.

Besides that, I don't really understand what problem you are actually having.

When I actually go through the form and enter a username, for example, and click submit, I only get the error for the password being required. Entering data into both fields, I get the successful validation message.

This sounds perfect, what's the problem?