Re: explorer-- then I probably used the wrong term. I was refering to the program you are using when you are on the desktop, and simply want to copy a file. Mac used to call this the "Finder," I believe.

Now the idea that you actually have more problem with experienced users is interesting. I can see that in myself (damn new microwave!). But I still feel like it's no harder to learn, however, than what a bunch of icons are supposed to represent. But once it's shown, then is it really hard for them?

Seems like the problem is one of discoverability, not complexity.