With the last NGG version (2.0.59), no meta datas are imported: nothing during photos upload, nothing with bulk Import Meta data.
Title field keeps the file name and the tags field stays empty though the photo has a title and some tags (stored in EXIF, IPTC and XMP formats).
When I open the overlaid Meta Data window, I still get "No meta data saved".
So what's off with last release? It worked great with 2.0.33 despite a confusion between the upload date and the pict datetime that is shown in the admin UI in the Filename column...