If someone comes in here and knows what you talking about I am sure you will get your answer, however I noticed you had not got a reply , but the only way I may be able to help is if you explain it slightly more...when you say Digital certificates are yu refering to the password manager or something similar or the certificates that certain programmes you own come with...but what that has to do with certain websites I dont know.
All I can say at this stage is that I had an issue with IE a while back. As a result I used Mozilla and I have not looked back since, yes it takes a while to get used to something new but thats the same with anything. Mozilla Firefox hand in hand with Mozilla Thunderbird is really the best.
Sorry I cant help further, but if you put your question in lamens terms I might have a better idea...I know a bit about computers, but Certificates for websites? Not sure on that one.