--- /dev/null
+[[!comment format=mdwn
+ username="http://smcv.pseudorandom.co.uk/"
+ nickname="smcv"
+ subject="comment 3"
+ date="2013-09-26T14:38:45Z"
+ content="""
+> \"how changes to underlay files would be detected?\"
+
+Changes to files in underlays are picked up automatically, as long as
+their mtime changed.
+
+> Couldn't figure out how to do [metadata] in in album.pm
+
+Yeah, I need to implement a hook mechanism or something
+(and work out where I put the exif plugin mentioned in
+the page).
+"""]]