So I just bought a SSL cert from hostgator for my site which is a C.O.M.O.D.O seal. All they give you is an image? Its not even clickable to any site information. Just an image.......... Whats up with that? Very dis-pleased..
COMODO have what they call a "Corner of Trust" which is little (or not-so-little) red triangle in the corner of your website. Rather than clicking it, users can roll their mouse over it to verify the ownership of the website. Presumably, if you have a certificate signed by COMODO then you should be able to get this "Corner of Trust". There's a press release about it here whith an example in the lower-right corner. It's all a load of bollocks security-wise but if it gains the confidence of your visitors and increases sales then it's probably wirthwhile.
I installed a Comodo Free ssl one my sites. and firefox doesn't verify it as legit cert. But I.E 7 does. I don't think their best the ssl authority..
Normal SSL Certificates from Comodo will have no problems authenticating in all major browsers. I have to agree that their site seal doesn't work as well as others though.