Nice to hear you are using opera now,
But I wasn't trying to convert you

, You can use whatever browser you're happy with
I've dabbled in linux a little I plan on playing around in linux a lot more but I don't know as much about linux as lotuseclat79, If you get any problems you can always post in the Unix/Linux section here,
As of for the smilies do you mean they won't go into the post if you click the icons or they won't work if you type them in manually?
Do you have javascript enabled?
As far as I know that should be the only thing that would prevent the smilies from working by clicking on the icons,