I have experienced the same problem and I am required to leave sslv2 off.. so supportSSLV3Only = True must stay on.. For FF, IE6/7/8, Chrome they all experienced problems. Opera did not because it does not support sslv2 anymore.. If you turn off sslv2 support in ie6/7/8 this problem goes away. In doing that Chrome will start working because it uses IE's settings. Firefox about:config and turn off sslv2.. All my browsers I didn't have to turn it off it was already off.. but I had cohorts that I had to have turn it off in order to access splunkweb.
you can duplicate the problem with openssl
[root@csc06splunkdev01 default]# openssl s_client -ssl3 -connect servername:8000
* works just fine, but have to specify to use ssl3 *
[root@csc06splunkdev01 default]# openssl s_client -connect servername:8000
CONNECTED(00000003)
write:errno=104
** fails cuz it defaults to sslv2 **
splunk-4.1.4-82143
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