Thank you for your post.
This should not occur, and I know that doesn't help you.
Are you using FileMaker Pro Advanced 9.0v3? If not, please update your version from our website. The direct link for the update is:
In addition, there is a secure socket layer update that you may also want to consider updating. The direct link for this is:
Install these and see if you continue to crash.
If you already have the updates, or if you continue to crash, does this happen with just one database file, or all files? If you close all databases before quitting, do you still crash? Have you tried uninstalling and reinstalling FileMaker Pro 9.0 Advanced?
Please keep me posted with your progress.