The creator says: (from http://labs.trolltech.com/blogs/2007...etwork-access/)
Ankur: no, the new framework is not multi-threaded nor thread-safe, but it’s reentrant. That is, you’re allowed to use a QNeworkAccessManager only from one thread, but you can have many objects, one in each thread.
which would seem to rule out your usage (creating in one thread, reading in another).