Once you have the certificate downloaded it will most likely start the Opera Certificate Manager.
There seems to be an occasional problem getting the certification to pass on Opera 8.5 in Windows. Here is the workaround:
It seems there is something about the caching where it wants both IE and Opera set at the same time before it will let the Opera cert. go through. Odd, but it works.
This page last updated: Jun 26, 2008