Dion Hulse d17168583d Prevent IE9 and lower displaying the download file dialogue when attempting to upload using the html4 Plupload handler.
The HTML4 Plupload handler uses a hidden iframe to POST the upload form,
Unfortunately Internet Explorer 9 doesn't support the `application/json` 
content-type which `wp_send_json_success()` and requires `text/html` instead.

This partially reverts [30354], keeping the better error messages.

Fixes #31037 for trunk.


git-svn-id: https://develop.svn.wordpress.org/trunk@31429 602fd350-edb4-49c9-b593-d223f7449a82
2015-02-12 01:14:47 +00:00
2015-02-06 05:57:54 +00:00
2015-02-09 16:00:44 +00:00
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137 MiB
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