if I'm right, take a look at: http://blog.typekit.com/2010/12/14/a-closer-look-at-truetype... and ctrl-f to 'delta' for a partial explanation of what's happening.
inconsolata seems to act silly regardless of the font size, I guess it might be just a konsole bug seeing as the font works ok with gnome-terminal etc
if I'm right, take a look at: http://blog.typekit.com/2010/12/14/a-closer-look-at-truetype... and ctrl-f to 'delta' for a partial explanation of what's happening.