Well, I'm slowly getting there!
After a few people pointed out that they couldn't view certain forums, or upload images properly, I've managed to sort out Group permissions, and file sizes, so you shouldn't encounter any more problems like that. Please shout though if you do.
You may have noticed that the names of the Groups have changed too - you might not be a Classy Turner any longer, or a Top Dog or a Legend, and that's because the previous list was far too large, and the benefits & permissions associated with each of them were cumbersome and unwieldy. Therefore I've simplified the hierarchy a little, and changed their names, but they're still promoted according to the number of posts that members have made, so those who've contributed most over the years (you know who you are) are quite rightly still honoured.
I've also begun to get my head around the Tutorials, which now appear in a tab at the top of the page, called "Resources". I've only had time to upload a few so far, but others will follow shortly, and if you have an idea for a tutorial or any other kind of resource that you think others would find helpful, please do let me know.