Domino R6 server crashes in Netscape 4.7

I am testing Domino R6 and am finding that the server crashes in Netscape 4.7 whenever a form is over a specific file size. For example, if a form contains over 18 subforms it crashes when loaded in Netscape. Is anyone aware of a patch/bug fix for this problem?

Subject: Domino R6 server crashes in Netscape 4.7

If you are referring to using Netscape to access POP3, my R6 server is crashing also and IBM has not been able to resolve. How are you measuring form counts?