I haven't had any trouble until this last week. I get this error whenever I try to upload a new image of a coin:

I have had the same problem....I simply keep on reducing the picture size until it can up load. I have no idea  what the maximum image size, for uploading is.  It would be nice if the "file too large warning included a statement filex must be no more than X MP

The file size I use is the same one I use for my web site (www.Moneta-Coins.com). We tend to produce huge file sizes from our cameras or scanners, way too big for the internet. A rough guide for a large photo that still loads fine into the ANA content: for two sides shown in one photo make it about 800 - 900 pixels across, half that for one side. It's important to reduce pixel density to 72 dpi (dots per inch), that's all a web page can render and will really reduce file size from the original. From mega pixels to a file size of 100 - 150 kb is what makes the web happy. Looks great and downloads quickly. The French medal shown is 100 kb.

Still can't post images to my blog or a collection or anything. Still getting the error: Unable to use file. It may be too large. It doesn't matter if I shrink it down to a really tiny image. I still get the same error. :( I was hoping to be able to blog about the National Money Show. Help!

I have the same problem.

Thank you for the tips! I'll try out your suggestions.