AlephNeil:

However, I think it's quite reasonable for P(A | E + "someone told us A") to be less than P(B | E + "someone told us B"), because if someone merely tells us A, we don't have any particularly good reason to believe them, but if someone tells us B then it seems likely that they know this particular Linda, that they're thinking of the right person, and that they know she's a bank teller.

I just skimmed through the 1983 Tversky & Kahneman paper, and the same thing occurred to me. Given the pragmatics of human natural language communication, I would say that T&K (and the people who have been subsequently citing them) are making too much of these cases. I'm not at all surprised that the rate of "fallacious" answers plummets when the question is asked in a way that suggests that it should be understood in an unnaturally literal way, free of pragmatics -- and I'd expect that even the remaining fallacious answers are mostly due to casual misunderstandings of the question, again caused by pragmatics (i.e. people casually misinterpreting "A" as "A & non-B" when it's contrasted with "A & B").

The other examples of the conjunction fallacy cited by T&K also don't sound very impressive to me when examined more closely. The US-USSR diplomatic break question sounds interesting until you realize that the probabilities actually assigned were so tiny that they can't be reasonably interpreted as anything but saying that the event is within the realm of the possible, but extremely unlikely. The increase due to conjunction fallacy seems to me well within the noise -- I mean, what rational sense does it make to even talk about the numerical values of probabilities such as 0.0047 and 0.0014 with regards to a question like this one? The same holds for the other questions cited in the same section.