ZenPHOTO 1.4.2.1 [9138] (Official Build)

Whenever the cached file of a webpage in the html_cache directory has expired, caching stops for that particular page. The old file remains and a new cache file is no longer created. This might be a bug.

Actually it should be overwritten with the same file. Sure it does not do that?

Pretty sure, the modification time of the expired cache-file remains unchanged.

Then please open a ticket.

Fixed in tonight's nigthy build