Yes, you should absolutely contact the predecessor.  It is good corporate diligence and failing to do so would be a bad decision on your part.<p>Have a script put together of what you are going to ask;
- Start with an overview.
- Allow them to back away if they feel uncomfortable about a question.
- Get a feel for what really went on.
- I agree with Jacquesm - take it with a grain of salt.<p>15 minutes on the phone with the individual will put you six months ahead if you take the position, or provide insight as to why you should pass.