Hello
my clients are going crazy and me too
the problem is in the photo galleries, regardless of expiration date, within a few hours from the pubblication, it automatically switched from published to expired status. the day after I control the gallery status and the same thing happens so i have to enter in every single gallery to publish again.
I use the wordpress 3.9.2 but i have the same problem with the 3.9.1 and the last xm imagestore 3.4.1 and happens only from the last week.
Best regards