I've been trying to search individual and all mailboxes from the admin panel.

Each time, it shows there are hits, but reports Finished with errors and sends an email like this:

Search task 3 completed with status with errors.
Imported: 30 messages.
Search query used: contentxxxxxx) is:anywhere after:3/1/2008.

The target folder does not contain any messages despite the 30 messages being identified.

Has anyone else seen this, or am I doing something obviously wrong?