I missed that part. I need to brush up on my reading skills

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My guess is that it is something in the html code. We have had instances where a site works fine in Opera\IE but not Mozilla, some that work fine in Mozilla\IE but not Opera, and some that work fine in Opera\Mozilla but not IE. In these cases, we have had to dig throught the html coding to solve the problem for our clients.
Hopefully Opera releases an update (I currently have 8.51) that addresses the issue like FireFox did; I doubt Yahoo is going to troubleshoot thier html code so it works with Opera.