You can always rename the icon (Opera, or whatever) by right-clicking on it, then left-clicking on Edit Item.gone got opra pet .it's on the firefox icon
Edit: ttuuxxx posted new Opera .pet on 9-15-11, here:
http://www.smokey01.com/ttuuxxx/2.14X/Software/
Unlike previous Opera .pet, it does not hijack the browse icon.
To create Opera icon, go to file manager:
usr/share/applications
...and drag Opera icon to desktop.
Use above instructions to rename it.