No, I didn't ask if you had a problem. I said, "thank you." When did "you're welcome" go extinct? I know that in some other cultures, the response to "thank you" may be the equivalent of "no problem" (i.e, ein davar - it's nothing ... in Hebrew; de nada - it was nothing ... in Spanish). But when I say thank you to someone, I don't want to know that you potentially had a problem with what I asked for or what you offered to do. It sounds as though the person I'm thanking would NOT have done the action if it had been a problem. Sometimes I'm tempted to respond "well, excuuuse me for asking." And while we're on the subject of thank you/you're welcome - I really get annoyed when I say "thank you" to someone - and the person responds, "thank YOU." It's a one-upmanship that drives me nuts. I hear this a lot on talk radio - from the intellectuals on NPR to the screechers on the other radio...
Because cantors talk, too.