v0.2.7.686: Crash when syncing with Outlook 2007 on Win7Pro

When trying to sync with (or import only from) Outlook 2007 the sync engine causes the follwoing exception:
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System.Runtime.InteropServices.COMException (0xB7A20009): One or more items in the folder you synchronized do not match. To resolve the conflicts, open the items, and then try this operation again.

   at Microsoft.Office.Interop.Outlook._AppointmentItem.get_CreationTime()

   at Wieldy.Synchronizer.Outlook.OutlookSynchronizer.?(MAPIFolder ?)

   at Wieldy.Synchronizer.Outlook.OutlookSynchronizer.Start(SynchronizerSettings synchronizerSettings, SecureString readPassword, Boolean readRequired, Func`2 continueHandler, Guid id)

   at Wieldy.Core.ManagerCore.Synchronize(SecureString password, ConfiguredSynchronizer configuredSynchronizer, FavorDirectionType favorDirection, Func`3 configureSynchronisation, Func`2 continueHandler, IProgressWindow progressWindow)

   at Wieldy.Core.CommunicatorBase.?(Boolean ?, ConfiguredSynchronizer ?, FavorDirectionType ?, Func`3 ?, Boolean ?, Func`2 ?)

   at Wieldy.Core.CommunicatorBase.?(Boolean ?, ConfiguredSynchronizer ?, FavorDirectionType ?, Func`3 ?, Func`2 ?)
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OK
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Any idea what is wrong here?
Thanks.