People will have issues with everything and anything...you compliment, they have issues, you don't say anything to them your going to percieved as stuck up, you call them zit face they have issues , and on and on...I remember once reading an advise column where someone had an issue with the phrase "No problem" after they thanked them...
If you know someone is sensitive about something, then apologize and don't do it again...I've learned your never going to make everyone happy. Sometimes we'll say things that will hurt others, just don't do it again if they find it offensive...if you've apologized and they still have issues, it is THEIR issue, not yours....