Also ran isinteg and received no errors on either priv1.edb or pub1.edb.
Here is the specific entry in the application event log...
Information Store (2012) 93de6b3a-0be2-4424-8ba1-54a92acc51f5: The version store for this instance (0) has reached its maximum size of 85Mb. It is likely that a long-running transaction is preventing cleanup of the version store and causing it to build up in size. Updates will be rejected until the long-running transaction has been completely committed or rolled back.
Possible long-running transaction:
Session-context ThreadId: 0x00000A3C
What do I do?