User blog comment:Sarah Manley/ Product Update - Video/@comment-188432-20120320150228/@comment-1613840-20120320203458

Hi CzechOut - Thanks for being so thorough. We are not changing $wgIllegalFileChars behavior we just decided to use a space due to a design decision. The upload tool will continue to add a - if someone attempts to add a file that has an illegal character.