Document.getResponses() crashes server

I am in the process of testing an upgrade from 5.0.x to 6.0.1, and have been crashing the server. This code is in a Java Script Library run by a Java agent. Keep in mind that this code works fine in R5. By commenting out lines of code, I am able to focus in on the getResponses() method of lotus.domino.Document. Has anyone else had this problem?

Is there any workaround in sight? This problem will most definitely delay or prevent us from upgrading.

Thanks in advance for any help you can give me!