No problema

"No worries" fits that category too.

I been hearing this or quite some time and realized I have adapted this as well in some cases. It kind of suggests it really was not an issue in the first place. Thanks for calling me with the info, "no problem" as the response, as in its was no trouble to do so. New slang?

Ben, I have the same issue ... by announcing "it's no problem" I I'm mediately think it is a problem. Then I recalled my 3 years in Chile as a peace corps volunteer. It's common, and we were taught to say in response to a 'thank you', "No hay problem." It seemed natural as we were learning a language, and it was part of the language. ... without discerning its actual translation. It still bothers me here though , and at least once I seeked clarification as to whether it actually was not a problem in serving me in a restaurant.

I find it a little jarring in a restaurant setting. As in, well, heck, I hope it isn't a problem to serve customers. It's the change from what we have known that jangles, I think. Other languages, French and Spanish, come to mind are closer to no problem or it's nothing. Do they even have a direct equivalent to you're welcome? Always a fan of "my pleasure."