Recently active questions in PBwiki tagged with file

Suddenly I cannot upload a pdf file on my 1.0 wiki. It seems to work, says "file uploaded successfully", but the new file does not appear in the list of uploaded files. It will still upload a word document ok. I need to do a pdf because that format should be accessible to more people. I used to be able to do this--what changed? and how do I fix it?.

How can I add security to files? I don't want all files available to all users.

Is there anyway I can embed a private video that can be accessed only team members who have accounts on PBwiki?

YouTube and other video sites that allow embedding are great, but once you try to make those files "private" they don't work embedded. Any thoughts on how to get around this?

I am sure this is an easy question...what kinds of file uploads are possible with pbwiki?

I uploaded a MS Word doc on my wiki page and realized I needed to make some changes to it. Now when I save it locally on my machine, edit it and try to re-upload, the wiki picks up and attaches the older unedited version. There is no way I can remove the older version from the wiki either. What do I do?