just a short question - what is "Assets in this source have public URLs" good for? Oh course, I can't use getUrl() in the templates, yes, but I can still get the filename etc. So I don't see the use of this parameter?
Another question: when I upload assets to craft, sometimes they are put in the folder I expect, sometimes craft creates a subfolder (named like the asset-id I guess) and puts the file inside that folder. In which case a subfolder is created?