Windows Live Photo Gallery (build 12.0.1308.1023) does not appear to watch
for metadata changes in image files.
It will take XMP metadata from image files to construct the initial Tag
list, but if images have their XMP Keyword metadata subsequently changed by
other applications, then WLPG does not recognise this.
Google's Picasa, on the other hand, does watch for changes, and will
automatically synchronise its internal Tag list with external changes in XMP
metadata on image files.
WLPG should take a leaf out of Picasa's book and automatically synchronise
Tag changes. Otherwise, it is not suitable for consideration as part of a
digital workflow involving multiple tools.
--
Geoff Coupe
http://gcoupe.spaces.live.com/ - the Blog
http://flickr.com/photos/gcoupe - the Photos
http://www.librarything.com/catalog/gcoupe - the Library