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KDE window decoration
I use Kubuntu system and Opera as a default browser. Opera's window icon is a default X.org icon, not a Opera's one.
Look at a link to see screen-shot.
What version of Kubuntu and KDE?
i have similar problem with Opera Developer, but not with Opera Stable or beta.
i am using openSUSE 13.2 and KDE 4.14.6