Issues with SharePoint list polling

Timestamp	Severity	Source	Module	Message
23/06/2011 4:18:12 PM	Warning	Change detection engine poll failed.	Change detection engine	"Change detection engine poll for connector SharePoint 2007 List Connector failed with reason StartIndex cannot be less than zero.
Parameter name: startIndex. Duration: 00:00:03.2295000
Error details:
System.ArgumentOutOfRangeException: StartIndex cannot be less than zero.
Parameter name: startIndex
   at System.String.Remove(Int32 startIndex, Int32 count)
   at Unify.Communicators.Moss2007ListWebServiceCommunicatorBase.GetIdsWhereClause(Int32[] ids) in C:\Hg\Connectors\Microsoft.SharePoint\Master\Source\Unify.Communicators.Moss2007List\Moss2007ListWebServiceCommunicatorBase.cs:line 371
   at Unify.Communicators.Moss2007ListWebServiceCommunicatorBase.<GetListItems>d__6.MoveNext() in C:\Hg\Connectors\Microsoft.SharePoint\Master\Source\Unify.Communicators.Moss2007List\Moss2007ListWebServiceCommunicatorBase.cs:line 232
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at Unify.Framework.EnumerableExtensions.<ActionOnFirst>d__1c`1.MoveNext()
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at Unify.Framework.ActionOnExceptionEnumerator`1.MoveNext()
   at Unify.Framework.EnumerableExtensions.<ActionOnLast>d__16`1.MoveNext()
   at Unify.Framework.EnumerableExtensions.<ProduceAutoPages>d__9`1.MoveNext()
   at Unify.Framework.Visitor.ThreadsafeVisitorEvaluator`1.Visit()
   at Unify.Framework.Visitor.VisitEvaluateOnThreadPool[T](IEnumerable`1 visitCollection, Action`2 visitor, Int32 maxThreads)
   at Unify.Framework.RepositoryChangeDetectionWorkerBase.PerformChangeDetection(IEnumerable`1 connectorEntities)
   at Unify.Framework.ChangeDetectionPollJob.RunBase()
   at Unify.Framework.MutexJobDecorator.Run()
   at Unify.Framework.DefinedScopeJobAuditTrailJobDecorator.Run()
   at Unify.Framework.AsynchronousJobExecutor.PerformJobCallback(Object state)"