Yes, I realized that any change in appearance on the speed dial page was probably unrelated to the UAC bug; I was simply pointing out that a change in appearance is a little clue that an Opera update was recently taken.
So I can find that developer build in Desktop Team Blog. I see! Mmmmm. A developer build can have several and/or serious issues. Thanks for the warning and for explaining where to find it. I'm just not that adventurous! Thanks to your explanations, I feel that the UAC bug is something I can live with for awhile. You've put my mind at ease.