IIS7: COM 0x800703E3 error

Problem: when requesting static files against IIS7, following error was reported to event viewer

0x800703E3
at System.Web.Hosting.IIS7WorkerRequest.FlushCore(Boolean keepConnected, Int32 numBodyFragments, IntPtr[] bodyFragments, Int32[] bodyFragmentLengths, Int32[] bodyFragmentTypes)
at System.Web.Hosting.IIS7WorkerRequest.FlushCachedResponse(Boolean isFinal)
at System.Web.HttpResponse.UpdateNativeResponse(Boolean sendHeaders)
at System.Web.HttpRuntime.FinishRequestNotification(IIS7WorkerRequest wr, HttpContext context, RequestNotificationStatus& status)

Solution: known issue in IIS7, fixed by Microsoft .NET Framework 3.5 Service Pack 1