I'm puzzled by why I can only upload PDFs from within the editor when I use JCE. The site I'm working on is using YOOtheme Pro and if I try to add a PDF as a link in a gallery element it "silently fails".
I then checked uploading a PDF by going to Joomla Admin > Control Panel > Media and uploading a file and for PDFs I get:
Error: Invalid mime type detected.
I disabled "Check MIME Types" in Global Configuration > Media and it still failed in Control Panel > Media.
If I disable "Restrict Uploads" as well then I can upload a PDF.
Our webhosts say that fileinfo.so is enabled.
What am I missing?!