Using Windows Small Business Server 2003, I have an Exchange 2003 server.

We have a calendar in public folders, where a user puts events. She uses a distribution list local to her machine to "invite" people to those events.

When she modifies the events, in the event log of the server is a 1025 error message (servername stripped for security reasons):

Event Type: Warning
Event Source: MSExchangeIS Public Store
Event Category: General
Event ID: 1025
Date:
Time:
User: N/A
Computer: SERVER
Description:
An error occurred on database "First Storage Group\Public Folder Store (SERVER)".
Function name or description of problem: FEqEntryId
Error: 0x80040107

I've run dbinteg and restarted the machine.. no help. Blew away her profile, recreated, no help. Microsoft's KB is just a little less help than the error message itself. Any suggestions or people who recognize this error out there?