Had a play with the light version, and i found that reading one line posts where annoying, as the white background because very narrow, especially if the poster had a large signature, as said signature is given a gray background.

One almost have to hunt for that small bit of text that is the actual post between the large sig and the info area above (also on a white background).

This may be especially bad as the actual quote and reply links are below the gray sig area, and as such one get no real sense of what belongs to what as things go white/gray/white...