If you are matting up images for the IRIS awards they should pretty much be done now. But I know a few people are still finishing up.
But this reminder applies to any of the PSNZ or Easter show exhibition events where images are displayed just in a matt.
When you or your framer sticks down the matt to the backing board you need to use a strong, permanent adhesive or tape. Some of the cheaper ones do not withstand the heating and cooling that the prints will be subject to during these exhibitions.
We have had this problem ourselves a few years ago where the front matt starts to lift. No harm is done but it is not very professional.
Papakura Picture framers does all our framing and matts and we have been perfecting the results. The IRIS prints produced this year look better than ever.