Flex & nginx : Channel.Call.Failed
We've had this issue for a long time...problem is we haven't been able to find a repeatable way to force it to disconnect.
Here the most comprehensive list of things to try that i've been able to find:http://www.bopit.in.th/2009/10/14/flex-channel-connect-failed-error-netconnection-call-failed-http-status-200/
We've tried a couple of those solutions and it seems like we're getting less client disconnects.
There also may be a problem with AVG's linkscanner hijacking the request as it leaves the browser, and then losing it somewhere. We had one machine in our shop that would disconnect when using IE, and since uninstalling AVG, it's never happened on that machine again.
another thing you could check is the socket timeout: NetConnection.Call.Failed happening sporadically in Flex3/Tomcat/BlazeDS/Spring
and here is a thread on adobe forum about the issue:http://forums.adobe.com/thread/552133