When uploading a file through the "Add RDF" screen, the (autodetect) option is supposed to determine the correct format and select the right parser. However, this does not work. In the current system, for any format other than RDF/XML, file upload with autodetect results in an error "Content is not allowed in prolog. [line 1, column 1] "
Only after explicitly selecting the correct format from the dropdown does file upload work.