[syslog-ng] Multi-line Logs

I have a host that sends mult-line messages (embedded newlines, not separate syslog messages) from what I can tell syslog-ng strips out all the newlines and replaces them with a space. Is there anyway to disable or modify (replace them with something else that can be easily s/// in post-processing) this functionality without changing the code and compiling from source? I have been through the syslog-ng manual and asked Mr. Google and I cannot find anything on this topic. Thanks...