Unfortunately some geo-tagged photos are not recognised by the underlying PHP read_exif_data function. This bug is trapped to allow the image to upload properly, but the latitude and longitude data for the image won’t be captured by this plugin. You will know if your image has a faulty set of geo-tagging data as the WordPress media list will not show the image as geo-tagged. As soon as there is a fix for this PHP bug – either in a later release of PHP or by using some other geo-tagging information extraction mechanism – a new version of the plugin will be issued to all users.