NS6 browser gets killed intermittently while testing merlin B54 on Sol Sparc8

Platform : Solaris Sparc 8
Browser NS 6
Build : Merlin 54

Steps to Reproduce

1.) On a solaris machine , Install the J2SE for merlin build 54 from :
    /net/sqesvr/deployment3/merlin/beta/solaris.b54

2.) Run any of the test cases like (HTTPS , OJI , Applet Caching )

Considering HHTPS test case :

3.) go to http://sqesvr.eng.sun.com/deployment1/ws/doc/proc/JPI_https.html
 
Run the test cases one after the other in the same browser session,

Result : The browser gets killed automatically after running 2 or 3 test cases

I have experience the similar problem while running Applet Caching and OJI test cases, the first few tests run sucessfully and then the later on the browser gets killed.