In the SVN codebase I have changed the FastAGI_log.agi script to only use one "h" extension for DeadAGI to reduce load and work better on highly loaded systems.
If you will be using SVN codebase on your system, please delete the 2 DeadAGI h exten entries and replace them with this:
exten => h,1,DeadAGI(agi://127.0.0.1:4577/call_log--HVcauses ... EBUG-----${HANGUPCAUSE}-----${DIALSTATUS}-----${DIALEDTIME}-----${ANSWEREDTIME}))
I have also mentioned this in the UPDATE doc, and I have changed the conf_examples accordingly.