On the Kickstarter blog:
On Wednesday night, law enforcement officials contacted Kickstarter and alerted us that hackers had sought and gained unauthorized access to some of our customers’ data. Upon learning this, we immediately closed the security breach and began strengthening security measures throughout the Kickstarter system.
To change your password, log in to your Kickstarter account and look for the banner at the top of the page to create a new, secure password. We recommend you do the same on other sites where you use this password. For additional help with password security, we recommend tools like 1Password and LastPass.
Sound advice. If you’re not doing this yet, I think you’re asking for trouble.