This topic addresses changes to version 2.0 that may affect your application if you choose to upgrade.
Changes to System Files
The following default files have changed for new v2.0 web applications:
If you have not modified these files in your v1.x application, then these
files will automatically be upgraded when you upgrade your application. If you
have customized these files, then they will not be updated. You may want to
create a new v2.0 web application so that you can review the differences in the
above mentioned files.