Having the same problem here. XP Pro SP3 running Outlook 2007 SP2. Intermittent problems with modifying calendar entries on a public calendar. Some entries are successfully modified or deleted, but others do not seem to change. Once the user clicks away from the calendar and then clicks back to it - the changes she made are gone! It seems like the client is out of sync with the server or something. The web-based public calendar is modified successfully every time. It is only the client that is finicky. I have run repair on Outlook, and installed all of the latest Microsoft patches, but nothing seems to drive the nail into the coffin on this intermittent calendar problem.
