The only problem I have is the eye bleeding white background. We really need to be able to put in a darker color back there to save our eyes. Other than that, having navigated the site for a while I do not have any real complaints about it. It's nice to see some more integration of Head-fi with the other aspects of the site (reviews for example) as previously the V-Bulletin forums still remained as a separate entity.
I also wish the space was utilized more efficiently. I mean there's nothing wrong with ads, but the big deal is how the elements are all proportioned. It's a huge waste of space to have people's username/avatar/joineddate/location/post count take up that entire area.
I'm with those that generally don't like the new format/software. I find I've reduced my visits substantially since the change. It seems more difficult for me to follow threads. Interesting that the change of format makes so much difference but it does for me.
I don't mind any of the changes (after you get accustomed to it, it's not too bad) except for one. This website is horrifyingly slow on my iPhone now. It makes mobile surfing extremely tedious and frustrating. Please cut down on the ads and banner or make a mobile platform. It is exceedingly difficult to browse otherwise.