That does not fix the problem.
If you download and install the Anarchy Media Player plugin (https://an-archos.com/anarchy-media-player), that will fix the issue.
I had the player installed and was having no problem with the streaming audio and video files or links to PDF and XLS files, but then uninstalled it and started having problems.
Re-installed it and it works like a dream.
Someone may want to confirm, but I think this can be marked as resolved.
