check any image on http://mikedooley.tv/photography/ and no meta data shows up in NGG. I went into manage gallery -> <insert gallery name> -> clicked on meta next to the image. Blank window shows up with a line that says "Show Meta Data" with an "x" in the far right. no other options or text. Downloaded the photo and checked the info via properties and meta data is present.
Files exported from Lightroom 4 into NGG. Everything is current. Site is MU.