We have the same problem with the latest upgrade for ELGG 1.8.15: pictures of photo albums do not show up anymore, users cannot get their uploaded images displayed.
So I guess we have to wait for the next upgrade?
We rolled back to a previous version so our users can continue, we hope this does not happen again with a next upgrade. We rolled back with a back-up service of Softaculous in c-panel at our server.
Thanx for the support...
@aadhar: downgrading to Elgg 1.8.14 won't help you in the long run. Waiting for a fix in Elgg 1.8.16 won't help you either as there is no bug in Elgg core anymore. There was a bug in Elgg core that has been fixed in Elgg 1.8.15. Tidypics only worked because it was depending on the wrong behaviour of Elgg core due to the bug.
Don't expect any changes in Elgg core to fix the Tidypics issue as it's clearly a matter of updating the Tidypics plugins to work again as expected. I've already released a fixed version of my Tidypics fork: http://community.elgg.org/plugins/1194049/1.8.1beta6/elgg-18-tidypics. Give it a try (as I wouldn't expect any new release of the official Tidypics plugin in the near future - and even if this one issue is fixed I've made quite a number of other improvements in Tidypics additionally).
The "Are you sure?" confirmation should only appear when there's unsaved content on the page (e.g. comment not posted yet). If you only view images and switch to the next image without entering anything the confimation should not appear - does not for me (with my Tidypics 1.8.1beta4 version posted this week). If the pop up shows up on your site even if you don't enter any text there might be a conflict with another plugin (though I've no idea which other plugin could cause that right now).
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