400 Bad Request in Infoview after FP 6.1 install

Hi everyone,

We've recently updated our  BOE XI 3.1 to SP6 (with Fix Pack 6.1).

The problem we're having is that if a report is scheduled to default enterprise destination and formatted as PDF, and a user views that PDF instance, when they close the instance they get the following error from InfoView:

400 Bad Request

The page you requested is not available on this web server for one of the following reasons:

• You have passed an unsupported nonstandard parameter.

After verifying that the error is not the result of a bad requested query parameter then Report this problem to the webmaster or the administrator.

This is happening with all Crystal reports in this environment, and is new with the installation of FP 6.1. The user can still click the "X" to close the document after this occurs.

Thanks in advance!