Seems to be a bug: https://github.com/zenphoto/zenphoto/issues/576
just saw github yesterday. i believe the issue is closed. So whats the conclusion, i cant understand that thread.
Another thing I discovered right now is that the login link issue is only from the first page i.e. www.outzeal.com
and from the "NEWS ARTICLES" and "PAGES" (on the right side) e.g. http://www.outzeal.com/index.php?p=pages&title=skiing
From any other page it works fine! e.g. http://www.outzeal.com/index.php?album=scuba-diving/
The reason this is not working from your index page is that somehow the colorbox login option is not happening. The Zenpage theme "forces" this option because there is not sufficient room in the sidebar for a logon form.
But this did not happen for your site. So, what modifications have you made to the theme?
Thanks Chief, that was it: "Setting the plugin option to colorbox" resolved the issue. I wonder how did it change automatically after the upgrade.
Last night I opened the options for this plugin and was about to experiment but just ignored it since I didn't know the logic.
Reason I was asking not to upgrade themes which I am not going to use was to save time, since zen-photos upgrades are very frequent. However they are so far all updated and there are no design modifications in the theme I am using. Though I am thinking how can I fit in google ads in this theme.
Anyways thanks a lot, much appreciated.
Thanks everyone