Some pug frames have shitty french standard bits in certain places but not others. Things like steerer threading and seatpost size were silly and garlic flavoured on mine.

[edit] oh and the stem was a slightly strange diameter on one of my pugs, but standard 1" on the other. I think I used the former stem on the latter frame, and it was all creaky. Needed shimming with a thin sliver of roquefort or similar.