Exec Secretary manages four different Exchange based calendars in Outlook 2007 (Win7). She showed me how her calendar display times in Outlook aren't matching the actual intended dates. I saw one today that was a week off. Another was two days off. By all estimates, everything is showing up fine on other machines - doesn't seem to matter who creates the original events... This has happened before and started up again today after she (quoting) "performed a search".
Microsoft Diagnostics for Outlook runs clean