Been seeing this off and on for a few months, in our MAD driver

DirXML Log Event -------------------
     Driver:   \foo\SERVICES\IDMDriverSet\bar
     Channel:  Subscriber
     Status:   Error
     Message:  Code(-9076) Unhandled error in event loop: Wrong index checksum, store was not closed properly and could be corrupted.
Nothing SEEMS to be acting different, but I do want to clear it. Checked google and geoffc's error code listings to no avail.

any ideas?

thanks dg