Steven Wittens was a co-creator of Drupal’s beautiful default theme, Garland. And he has a thought-provoking post about the current state of design in the Drupal community and his frustrations in trying to improve it.
Many of the arguments in the comments to Steven’s blog were that designers tend not to collaborate. And that they can be difficult for programmers to work with. And that the Drupal community lacks many good designers. Some even said designers are prima-donnas and they don’t know CSS.