I’ve received a question through the Russian TechNet Forums, answer to which is to be widespread. The fact is that the CRL checking process has been change in IE7 in case CRL is not reachable. While IE6 shows the warning in that case, IE7 by default doesn’t show anything. It is easy to think up the situation (which is, fortunately, harder to implement) which will lead to some problems due to such a behavior of the browser.
It is quite easy to switch the thinks back, just add the following key to the registry:
After that we will receive beautiful, extremely cheerful yellow warning in the address line:
Of course I must warn you of necessity to backup registry before the procedure.