AcrpPDF.dll - ActiveX Heap corruption

We're using Acropdf.dll and the ActiveX components.

We create a Window in our unmanaged code by ID

  m_axWnd.Create(hParent, rect, _T("{CA8A9780-280D-11CF-A24D-444553540000}"), WS_VISIBLE | WS_CHILD | WS_GROUP | WS_TABSTOP);

 At some systems, our applications crashes after the Adobe Window is closed.

We used the Application Verfier tool from Microsoft to analys the crashes and we found out, that the loaded adobe dll produces a Heap corruption of the calling process. In some cases, I get an error-message from adobe (see screenshot)