I received the following email from WaMu tonight. Although FICO(R) scores can change over time based on changes in your credit file, we want to let you know that a recent update to the FICO scoring system may result in an additional change to some people's FICO scores. Our system has been updated to return the most recent version of FICO score, so you might see a different score the next time you visit the site. We expect that most people will see a relatively small change in their score as a result of this update. Fair Isaac--the company that developed the FICO score--changes the scoring model periodically to reflect the current lending environment. This updated version of the model ensures that the FICO score continues to be reliable, consistent, and powerful risk assessment tool.