Hey folk, I'm just working on some caching for a non-Koha project, and I was just thinking. maybe we could use the ETag and If-Match HTTP headers to detect whether or not we've got a mid-air collision when editing bib records. It's not something I'd be looking to work on, but I figure it's an interesting idea. Alternatively, one could implement their own app-based hash mechanism to do the same thing. David Cook Senior Software Engineer Prosentient Systems Suite 7.03 6a Glen St Milsons Point NSW 2061 Australia Office: 02 9212 0899 Online: 02 8005 0595