nigel_k, on 2011-September-20, 14:24, said:
Obviously South should have better diamonds but I think something like Qxx xxx AQJxx xx would be ok.
Well, both Qxx xxx AQJxx xx and the actual KQJ xxx Kxxxx xx are obvious 2D bids in my book.
It is better to make a slight overbid and show the full hand early. Passing is a much bigger distortion and what happened subsequently should come as no surprise to anyone.
An interesting alternative would be to bid 1NT over 1H. That is probably an even lesser distortion than 2D and would certainly be my bid with a diamond less and a club more. The lack of stopper is a very tertiary thing. Pard can check its absence with a cue:
1C 1H 1NT 2H
3H
In this case responder, having none, would bid 4D or perhaps 3S.
By the way, as to the blame I'd say both made errors. I wouldn't blame anyone in particular but 50-50 seems fair. North for not realizing 3D cannot be a good contract and South for muddying the waters.