[ZeroAdunn]

Actually this is what I heard about the klingons:

Early klingons used midget slaves to design and construct everything. Consequently kirk Era klingon ships had very low hanging doorways. The klingons, being of normal height would constantly bash into these doorways, thus smoothing out their doorways. Eventually the klingons got tired of the romulans making jokes about it and redesigned all their ships to correct specifications.

On a sad note, all the klingon midgets were slaughtered for their misdoings.