Blah, I guess that's what I get for not checking this topic earlier?
As of now pretty much most of the themes are bad. Simply because, for example in the "grunge" theme you can fit for about 70 words per line and that's too little. Right now pretty much every every combo thread doesn't fit a combo in a single line unless it's punch and fireball and all image threads look bad since the images are chewed up unless they are 300 x 300 or something, so booh.
I switched to the the acid purple theme since it can fit for about twice the words per line than the other themes, but the stark color contrast hurt my eyes enough for me to choose "select everything" every time I open a window.
edit : Oh, so it's back (temporarily?) to the old default theme.