[Interest] 4.8.0 QNetworkAccessManager (SOAP) failure

[Frank Hemer]

Since qt4.8.0, qtsoap with payload size > 8Mb fails.
When using qt4.7.x, the _identical_ data transmission works like a charm.

Watching the data transmission via tcpmon shows the request gets never sent. 
QNetworkAccessManager reports 'Network transport error (99): Unknown error'

Details:
This happens when issuing the mentioned SOAP call as a second call, the first 
call (small data footprint) works without a problem.
Waiting a while (~1minute) before issuing the second (big) call makes it work.

I happen to remember there were some changes in NetworkManager regarding 
caching and repeated calls to the same address ...
Does this ring a bell for anyone?

Thanx
Frank