Picture tags on 360 extender?

I just recently started using Windows Photo Gallery to tag pictures in my
library. I noticed that these tags show up right away in WMP11 (as keywords)
and when I load Media Center (on that machine) the tag categories show up as
well (to use as a filter).

However when I connect to this MCE machine using my Xbox 360 extender the
new tags do not show. The tag option is obviously there but none of the tags
I added show up. Do I need to ‘force’ an update of the extender library or
something?

I’ve waited several days to see if it would ‘catch up’ with the MCE machine
but no dice.