So here's the scenario: I have a file field with max_files set to 1. If I have already saved the page with an image, and then open that page to edit in the control panel, I no longer get the "Max Files Reached" message unless I try to upload an image. Then if I delete the image that's there and try to upload again... nothing happens. I checked the console and there's this error:
Uncaught TypeError: Cannot read property 'removeChild' of null
I'm using Chrome on Windows. Just FYI.