Top 25 software errors
SANS, along with a coalition of individuals and software organizations, just released their list of top "25 most dangerous programming errors". There has been some talk of making these a "requirement" or some sort of logo program to help protect customers when deciding which software to use or purchase.
From a developer's perspective you should review these and ensure your design and code are doing the right thing. From a tester's perspective, be sure you have cases in place to validate and document how you are verifying these. If the items do become a hard requirement your group will probably have to provide proof of what was tested and how.
Ideally your team is doing all this anyway, but if not, here is a handy checklist to get started.