Board Thread:Support Requests - Getting Started/@comment-6016542-20130406062054/@comment-10688548-20130412190526

Echoblast53, those are the file types permitted on Community Central. Not all wikis permit the same set of file types. It looks like the default set, which would be most likely to apply to the OP's wiki, would be:

png, gif, jpg, jpeg, ico, pdf, svg, odt, ods, odp, odg, odc, odf, odi, odm, ogg, ogv, oga.

I suppose it's a tad irrelevant, as PDF files are supported in any case, but for any administrators who are interested: you can use Special:Contact/general to enable additional file extensions. I did this myself to enable the upload of BMP and TGA files on my wolfenstein. You might even also increase the maximum file size permitted- that will be for Staff to decide.