We are experiencing some similar problems as mentioned in http://www.experts-exchange.com/Software/Server_Software/Web_Servers/ColdFusion/Q_23639104.html
however, it is not code dependent as to what's going on.
When we view the source there is absolutely nothing displayed. I have checked with another forum that mentioned upgrading jrun 4 but our current version is already past the suggested update.
The problem is fixed temporarily after a reboot (i cannot restart the services when this happens)