Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
When the ap_http_header_filter processes an error bucket, The passed brigade is cleaned up before returning AP_FILTER_ERROR down the filter chain. Error responses set by filters were being coerced into 500 errors, sometimes appended to the original error response. A configuration option to insert strings in HTML HEAD has beena dded. A new LogFormat parameter, %k, logs the number of keepalive requests on this connection for this request.