Best idea yet!! Drop this CMS and/or forum
I think it's quite clear to everyone that either this application blows or this implementation is borked to the max.
On my connection in England, I was a perfect 2 attempts each time I tried to log in. Here in France, it takes 3 attemps (no fail), everytime I need to log in. I'm not the only user with this problem. It's not a client issue, hell, I frequent more than enough websites and forums to know I'm not the problem here.
Props to the CMS, the layout it nice and clear, not too busy... with the login issue, could it be the server side caching? I don't know, but would it hurt to test without it for a week and see if people's troubles disappear?
Not only that, but this forum style is nasty. Sure, logically, showing replies to specific posts makes sense. But we're using computer screens. It's not a verbal discussion. Post responses should be in date order (considering that typically responses are part of an ongoing discussion within the thread and not a specific response). Also, the response posts are staggered. Just take a look in any thread with multiple responses. The post div can really shrink to a miniscule size, therefore being of poor readability.
Surely there are better free CMS applications out there. For that matter, why is a CMS being used?! It's not like there's a constant (daily) stream of updates being made. Static pages with a well known supported forum software would have worked a treat, in my humble opinion. =]