[syslog-ng] keep-alive question

I'm having remote connections drop with 1.6. I have my hosts log to localhost stunnel to my server. The problem seems to be when hosts rotate and HUP their daemons, it breaks the stunnel connection. I believe my log server is working after putting keep-alive on it; when I reload it, I don't see messages indicating reconnects. It doesn't on the clients, though, it gave me a syntax error. It seems keep-alive only works in source sections but not in destination sections. Is this correct? The manual online seems to suggest it would work with any tcp stream... (the man page that came with my syslog-ng doesn't mention it at all). Is this different in 2.0? Thanks, J