I've seen a number of posts about getting a 404 for all files or all files of a certain type.
In my case, some files can be accessed and some can't.
I open IIS, click on the website and switch to Content View. I right click on an image and click Browse and it comes up in IE. However, I can copy a file to the server, do the same steps as above in the same folder and it comes up with a 404. I checked the permissions on the image I copied and they're the same as the existing ones.
Every existing file opens and every new file I copy to the same folder fails.
This server is a clone of another. All the images that work were on the original server. I don't think this should matter but I thought it was worth mentioning.
I'm at a loss of what to try next.