Weird problem, but maybe somebody can point me in the right direction. My form consists of a few basic text fields and an image upload. The images upload and appear correctly in the WP admin Entries area, but sporadically the link in the admin notification email has these characters "!%20", causing the link to be broken. This is not a result of spaces in the uploaded file-name; it is in the file path itself. For example, "http://mydomain.com/!%20wp-content/uploads/..." and "http://mydomain.com!%20.com/wp-content/uploads/..."
My client alerted me to this problem and I've seen it in his emails, and I've tried to replicate it by uploading various files/filenames, but without any luck. Any idea where this might be coming from?