Quite often a number of users will give similar answers to one of my questions. Sometimes someone will give an answer that is interesting, but does not really help with my question.
In all cases, I feel a need to thank the people who answered my question. It isn't always appropriate for me to upvote every answer, and I can only accept one answer. Giving a "thanks" comment on every answer appears to be frowned upon.
So, what's the etiquette?