But, if I switch to "obfuscation only please", can I connect to a EMule 0.49BETA Client without beenig firewalled?
I think no.
(I found one 0.49 Client in the "Clients" List today)
if you refers to the option in amule svn i think it works as stated below
http://www.emule-project.net/home/perl/help.cgi?l=1&rm=show_topic&topic_id=848Allow obfuscated connections only:
If you enable this option, eMule will only establish and accept obfuscated connections. Clients which do not support obfuscations are ignored, incoming plaintext connections rejected and the automatic server connect will only allow obfuscated connections to a server. You should only choose this setting if you know that the ED2K Protocol is completely blocked on your network, otherwise you will loose sources and therefore slow down your eMule. However if you know that eMule is blocked, then enabling this option is recommended, because it saves connection tries which are guaranteed to fail and therefore would waste time, overhead and resources.
so you can connect only to emule > 0.47b
at the moment i think emule0.49beta (kad only enabled - allow obfuscated connections only) can talk only with emule0.49beta and no other clients