I’ve looked at the Options->Mixcellaneous, but it only organizes by year and month, not by date.
I could rename the pictures, but the thing is that I do all my pictures in this screen capture way (it makes a good web-sized big version quickly, so I don’t have to do anything to resize the images off my camera). Thus, pretty much every day or two I’ll have another Picture 1.png, and it would be much more convenient if they would just be renamed when I upload. That seems like the correct thing to do; I wouldn’t think the default behavior when uploading a picture on a new post should be to overwrite an image used in a old post…even if the pictures have the same name.