<rant>
Few things drive me more crazy than going onto a forum of an open-source product and seeing some user complaining about something that they don't understand. It's one thing to be frustrated but don't treat the OSS developers as if they work for you.
Documentation is the big gripe against OSS and sometimes I can understand, but if you have the source code AND IT IS FREE ... wouldn't you choose to investigate the code and not only answer your question but learn some stuff at the same time?
The OSS I use is developed by folks who are spending lots of energy on their software and I really appreciate their sharing.
If that doesn't work for you, perhaps you should buy an equivalent commercial product.
</rant>