We are also encountering this issue with the KB912812 critical update
that went out yesterday:
*** Code Download Log entry (25 Apr 2006 @ 12:43:48) ***
Code Download Error: (hr = 800b0111) Trust verification failed!!
Operation failed. Detailed Information:
CodeBase:
http://****.******.com/Control/MLXClientUtils.cab
CLSID: {6FD482A3-7B57-438B-B040-52CAA30147EE}
Extension:
Type:
LOG: Reporting Code Download Completion: (hr:800b0111 (FAILED),
CLASSID: 6fd482a3...,
szCODE
http://***.*****.com/Control/MLXClientUtils.cab),
MainType

null), MainExt

null))
--- Detailed Error Log Follows ---
LOG: Download OnStopBinding called (hrStatus = 0 / hrResponseHdr = 0).
LOG: URL Download Complete: hrStatus:0, hrOSB:800b0111,
hrResponseHdr:0,
URL
http://****.*******.com/Control/MLXClientUtils.cab)
LOG: Reporting Code Download Completion: (hr:800b0111 (FAILED),
CLASSID: 6fd482a3...,
szCODE
http://*****.******.com/Control/MLXClientUtils.cab),
MainType

null), MainExt

null))
If I uninstall the update it works correctly or if I already have the
AX controls installed it's fine. If I install the update, uninstall the
AX controls and then try to re-install them again I get the error. I've
tried changing the AX settings in security to no avail. Not sure what
has changed with that patch.