Can't click submit when adding file (not image)

That is because the Wysiwyg isn't meant (yet) to insert media types other than image, I've read in other subjects that it was hard coded that way (will try to find the source)

The bug here is that the wysiwyg still shows the other media types, as described in

Respect file type restrictions in media browser library view

and

'Allowed file types' rubric in wysiwyg upload interface is wrong

finally, i'll mark this bug a duplicate, because if you want more than one type of media to be added using the wysiwyg, this issue already exists:

Expose the media types allowed for WYSIWYG variable in the UI

I tried to inline a PDF file as a simple link, using the default full view mode of the application file type (used for PDF).
In the format form the submit button is indeed buggy because imgElement is empty.

However, the markup (formattedMedia) is like :
<span class="file"><img class="file-icon" alt="" title="application/pdf" src="/modules/file/icons/application-pdf.png" /> <a href="URL" type="application/pdf; length=SIZE"> FILENAME </a></span>

That's what I would expect to see into the wysiwyg area (using tinymce).
The problem here is that var imgElement = $(this.stripDivs(formattedMedia)); fails miserably (or works as intended). I'm left with a simple PDF file icon.

Obvious fix : remove the workaround for ckeditor : 1412460-3-p1.patch

Then comes a second problem :
Activate the link file format to the application file type (renders the plain text file URL) => the format form is unable to bring anything to the textarea again.

fix : test for markup; if there isn't then use the text (in a span) : 1412460-3-p2.patch (above patch implied).

I still don't see why such kind of patches would have to wait for #1016376: Expose the media types allowed for WYSIWYG variable in the UI, #1037234: 'Allowed file types' rubric in wysiwyg upload interface is wrong or #1293908: Respect file type restrictions in media browser library view.

As mentioned in #3, Media's WYSIWYG integration currently only works with images. This limitation is currently being discussed at #1283844: [meta] Improve WYSIWYG integration and is being worked on in #1451316: Clean up wysiwyg-media.js.

Fixed a typo

Switching to an earlier version of jQuery in my Administration theme did the trick. I switched to 1.7. YMMV.

/admin/config/development/jquery_update