Think this topic is a bit outdated but just giving it a go to spread the info.
Few months back posted this one, it’s about the errors you get when
specifying alternate files to upload in a blog. For every file you would
like to upload in blogs you had to specify the MIME type in the WAS console.
Found out that this kind of configuration is not longer required in LC 2.0.1.
Also had this confirmed by the guys of IBM.