Currently partial subscription expiry checks the:
- article publication date
- issue publication date

This enables partial access to both articles published on-the-fly (appended to the current issue) as well as to the entire issue via traditional publication (whole issue published when it's ready).

For content imported via the new expedited submission process, the article publication date will be the current date. Editors can modify the issue publication date, but not the article publication date, resulting in partial expiry subscription being denied for this imported content.

Remove the article publication date check as this level of granularity is likely overkill -- for issues published on-the-fly, the issue publication date may be used for the check, regardless of when the actual articles were appended to the issue.

Courtesy of http://pkp.sfu.ca/support/forum/viewtopic.php?f=8&t=4218#p19234