The hidden input fields that goes along with the current value indication of the
image and logo upload fields are closing the value attribute too early, leaving
the actual value outside of the quotes and invalidating the HTML.

The current output HTML looks like this:

>>>>>

<input type="file" name="m1_imageupload"/><br />
Current value: filename.jpg<input type="hidden" name="m1_imagecurrent" value=""
filename.jpg />
 -- Delete:<input type="checkbox" name="m1_deleteimage" value="checked" />

<<<<<

See the hidden input’s “value” attribute with the file name next to it? That
should be inside the quotes.