Hi Jeroen,

All writable tags which are considered "safe" to write should be written back to the file. This includes the GPS tags, and this works fine for me (I just tested this -- could you try this again?). The tags that aren't written are MakerNotes tags (since you can only write these as a block, and the block isn't storable in XML format), and "unsafe" tags.

If you want to preserve the makernote structure, you must go to a binary format meta information file, such as MIE instead of XML.

- Phil