>>You had the next edition after this one, assuming the module you are
>>remembering is the one about the Caves of Chaos, (a bunch of different
>>humanoids living around the sides of a small valley).
>
>Yeah, that was it. Weird that they would have shipped different
>modules with different editions of the basic ruleset, but then, the
>entire concept was pretty weird anyway.

B1 had a number of issues, most notably in that it was effectively unfinished: Many of the rooms, (it was a pure dungeon crawl), either had random contents or were left for the GM to fill.