I'm very sorry you're getting so much problems with JForum. A lot of people don't. There is no software bug free.
Phpbb has (or had) a lot of security flaws, and Jive is not free (neither cheap).
Version 2.1.6 of JForum has some problems? yes, it does, and that's why we're here: to fix them and make it better.
I have seen JForum running on all containers you quoted, in both Windows and Linux. The sad part is that not every single OS install is equal, and there are unknown factors that may interfer on the correct software functioning.
Why don't you try the
beta release of JForum? It may work for you.
I completely understand that, if JForum is not working fine in your box,
you should do whatever is the best for your and your company.
Rafael
[originally posted on jforum.net by Rafael Steil]