Software Uninstaller shows the Opera icon for Opera widgets, but they usually have their own icon in the executable.
I'm replacing the above item in my checklist with this more accurate one:
Software Uninstaller shows the Opera icon for Opera widgets, but the one actually used by the widget (and Programs and Features) is defined by the DisplayIcon entry in the widget's Uninstall key.
Specifically, the icon showing in Programs and Feature and used by the widget itself is defined by this key/entry/data:
Key=HKCU\blah blah blah\Uninstall\widgetname
Entry=DisplayIcon
Data=path to the icon file actually used
This is definitely just a cosmetic issue! :