Thanks Xav. I think it turned out to be that 'the object' was actually a group of objects that had to be further ungrouped before the opacity could be properly changed. Something like that, at least! Thanks again!

Greetings! In trying to learn how Inkscape works, I was experimenting with an SVG version of the Wikipedia logo. When trying to change the color of the puzzle piece boarders, I encountered a problem: some of the objects seem to have some built-in transparency - no matter what I do I can't get certai...