We are having the same issue with Adobe Reader 11.0.07.
We are embedding the AcroPDF.PDF using AXHost and our call to create the control fails with an access violation.
hr = AtlAxCreateControlLic( OLESTR("AcroPDF.PDF"), m_wndMain.m_axwnd.m_hWnd, NULL, NULL );
This is impacting our customers as we have no control over when they update. I too would like fix as soon as possible and have also reported it via the Bug Report link above.