While doing review work I came across this question, which has attached to it an answer deleted by "Community" (and as it's deleted by a mod, I can't vote to undelete).
It's not clear to me why it was deleted, the answer is valid in the sense that it attempts to answer the question (whether it's a good answer or not is irrelevant, that's what voting is for). It doesn't contain abuse or advertising.
Is there something here that I'm missing, but should be on the look-out for as a responsible user, or is there some behind-the-scenes issue, independent of the answer content?