>Yes, I have this as well. No big deal, though...
No, this is no big deal - but I wanted to mention it, all the same. Perhaps the problem appears in several browsers; perhaps it is easy to solve...
Correction from my previous posting: The extra sound doesn't appear every time Opera loses or receives focus; only when minimizing or maximizing Opera.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)
