The demo is really good. But something I noticed right away is the weird colour combination used in the stripes between forums, and in the stripe that is supposed to show the members currently online. The colour combination makes it difficult to read out the text displayed in these stripes.

Perhaps you could use a White colour for the fonts...

Overall the look and feel is vastly improved, although I would miss the old Forum look ...

Good work, and it would be a good idea to let all us members know how you did it, especially the problems that you faced and how you overcame them...