What CSS are you using? Is it the text-decoration or what other parts the pseudo-class have been applied?
css2. the rollovers dont work and you can't click the links. I am not sure if it is only a problem on opera/mac or just opera on any system
If you cannot click the links, that should not have anything to do with CSS actually. Can you provide the link to the offending page?
It could be if his a's are blocked by other content or if they are not filling up the outer element, etc
if you are on a mac using Opera click on the link in my sig and check the links in the right nav. thanks