What constitutes describing a style as a, "Professional vBulletin 4 Style" when the only changes from the default vb style are color variations and changing the background of a single block header?
I take "Professional" to mean it doesn't have rainbows, unicorns, or dancing cats (or the like) in the style. Something you would see as the style on the forum of a major corporation and not the style of the forum for an up and coming local band.