Blue. How stunningly not like every other forum on the face of the planet (apart from those that use the standard blue grey phpbb skin). I know it must be a winning formula if so many people use it, but this place had an element of individuality, now it's just blue.
The rounded boxes and blueness seem to make the forum content much narrower - I think it's just an optical illusion, but it does seem more claustrophobic to me.
The lack of borders and main forum table extending into the footer just looks weak and half finished. No real definition between content area and background, at least not on my screen. I don't generally like borders, but either a change of colour between table and background, or a border, should be implemented IMO.
The text, especially quoted, looks naff and small.
The page looks, basically, "busy". Too much going on in bold small text distracting the eye. The home and add menu pages are even worse, information overload. They always did have a bit too much going on, but now they've got too much going on in too distracting a way too

Searching by distance just wears out my mouse without actually doing anything of use that I can see - Could do with being fixed as surely the ads are quite fundamental and that's an actual fault rather than an aesthetic issue

I think if the left and right columns could be hidden so the main table (forum and profiles) could go full width a lot of my issues would be resolved - I'm not interested in a cluttered menu left and right when I'm trying to read a post or perv over a profile.
There are touches I like, some of the graphics are much better, and the smooth/ rounded boxes are more pleasant (if very blue) compared to the blocky versions, but I have to say overall I'm not a fan. Not that I can design a website to save my life, I just know what I like :)