[Serusers] SIP MESSAGE method revisited.

Okay, Since I've been unable to pass SIP MESSAGEs back and forth through our server, but knowing full well that I once was able, I decided to take our configuration and remove everything in it that we've added over time (slowly regressing back to the beginning of our SVN code repository for the SER config) and see if I could tell what had changed so that I can no longer pass a SIP MESSAGE back and forth between clients. It didn't work. SO... I decided to take the hello-world config and try with it. No luck. What am I missing here? Is there some special handling that is needed to pass a SIP MESSAGE in SER 0.9.6? Is there a chance that something basic would have changed between 0.9.0 (our original server) and 0.9.6 that would have broken our ability to pass the MESSAGE method without additional tinkering? Sure, if I put in a block like: if(method=="MESSAGE") { sl_send_reply("200", "OK"); }; ... it's clear the message gets there and I receive the 200 OK, but of course it doesn't go anywhere after that. Without that block in there, it ends up getting a 513 Message too big response (which seems to be somewhat of a default for messages that don't end up getting handled in any other way that SER understands). I'm now completely at a loss. Pointers. Tips. Snide remarks. Anything helpful would be greatly appreciated. N.