Occasionally I get an almost empty page as a response to the api, when adding events. Usually I just get this one line:
<!-- w3.up.sp1.yahoo.com uncompressed/chunked Mon Nov 15 16:52:59 PST 2010 -->
It happens 5-10% of the time. It's quite possibly a data issue on my part, but I don't get any error response so I don't know what I'm doing wrong. I can give you sample data but I was wondering if there was a general answer as to why this was happening.