Assertion Thanks. That quote risks giving the impression that the meaning of some utterance is to be found in the intent of the listener or the speaker. That's not Davidson's approach. For Davidson, an utterance functions in a context by the listener interpreting that utterance in such a way as to discern the beliefs and intentions of the listener, on the presumption that the speaker and listener share much the same beliefs and are both rational.
Hence Davidson's account provides an explanation for how we are able to understand malapropisms, which by their very nature run contrary to the conventions of language.
Davidson might well say Tim's "words do have a stipulated, conventional meaning that relies on limited context, that is accessible to all speakers" is a useful fiction, but no more.
For me the interesting thing here is the comparison with Searle, who gives an excellent account of how conventions function in the construction of social reality. I don't see a strict incompatibility between Davidson's account of interpretation and Searle's account of the construction of social institutions. Paying that out would make an interesting thread.
As for Tim and Leon, from previous discussions I suspect they share a simplistic view of meaning as speaker's intent, although I may be mistaken. We won't find out, until they find a way to move past merely scoffing and actually address the discussion.