We’re investigating an issue that’s causing media uploads to fail. The interface will show the upload succeeded but if you try to download the file you’ll get a 404 error. Uploads via FTP are working so if you need to get something published ASAP use FTP for the time being. We’ll update this post shortly with more details.
UPDATE 2PM EST – We are still working on the issue, for the FTP workaround we recommend uploading to the /public directory and then going in and manually editing the post that gets automatically created.
UPDATE 2:40 PM EST – The issue with uploads not working has been resolved. If you uploaded a file that you are getting a 404 error on you will need to re-upload it for it to work correctly.