Some users of Google Music's new scan-and-match functionality, recently rolled out in the US, are complaining of problems when it comes to explicit content in their library. Explicit songs are reportedly being replaced with "clean" versions sans offensive language during the matching process. Oddly enough, other people are seeing the exact opposite scenario: clean content is instead being swapped with the original, explicit source material in the cloud — a potential concern for parents. If this problem sounds familiar, that's because Apple experienced precisely the same issue soon after it debuted iTunes Match. Whether this challenge is simply inherent to music matching services or something else is at play remains unclear. We've reached out to Google for comment on the matter and will update this story if the company responds.