Users being asked for skype name

[Lynne]

I know it is a field, however, vbulletin does all it's text in phrases and there is no phrase that says "you haven't entered a skype name" or even "you haven't entered". If I knew the phrase name, it is easier to figure out where the error is from, but since there is no phrase that says that, I have to wonder where the text is coming from which made me think maybe a modification.