Hi Gerard
What you call a design bug is in actual fact a design feature. One point that you are missing is that the meaning of a word spelled the same between dialects may be different. This is exactly one reason why this duplication is needed. The same is true for etymology; when a word is used for a first time in THAT orthography or dialect may be different as well, it may arrive from another dialect and not from another language..
No Gerard, this is only needed when there really *is* such a difference. You force us to duplicate our entries even where it is not needed at all.
Besides: to my understanding the question of American English vs. British English has not been answered. I do see the same problem there. It is the same problem in the word entries and in the definitions.
Heiko