Has anyone seen a problem where the connector is giving server failures when trying to sync tasks?

I have a user that is having trouble getting his outlook tasks to sync correctly.

The only error I see is :

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&lt;/HTML&gt;</content></mp></mp></m></default></SetTaskRequest></soap:Body></soap:Envelope></Request><Response><soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope"><soap:Header><context xmlns="urn:zimbra"><change token="276863"/></context></soap:Header><soap:Body><soap:Fault><soap:Code><soa p:Value>soap:Sender</soap:Value></soap:Code><soap:Reason><soap:Text>invalid request: recurrence used without DTSTART</soap:Text></soap:Reason><soapetail><Error xmlns="urn:zimbra"><Code>service.INVALID_REQUEST</Code><Trace>btpool0-29714:1267469524197:c152b3bd4177d144</Trace></Error></soapetail></soap:Fault></soap:Body></soap:Envelope></Response></SyncError>