There have been a few instances where Photoswipe isn't working properly after the 1.0.2 update. From thumbnail and image icons not being clickable, to the Single HTML pages being shown rather than the Photoswipe large image pages.
Here's something from Ben to try:
fix your template by appending ?reloadModel&skipCache to the end of an album URL.
What this does is reloads the settings structure for the web engine (e.g. Standard Album), picking up elements that have changed. In this case, 1.0.2 added a scaffolding JS file that hadn't been coming through.
This undocumented step should not have been necessary. The change of version from 1.0.1 to 1.0.2 should have triggered the reload