I was uploading some pieces of mine earlier, and I had trouble with the "File/Image type" field.
My complaint was that, some of my music is handwritten, but I can't select "Manuscript" because it needs to be a public domain file, and mine aren't (they are released under a CC by-sa 3.0 license). Also, if I choose "New Composition", that does not give any information whatsoever with regards to the nature of the file. What's more, in 50 years time, it won't be a "new composition" anymore. It seems like that option in the field is the one that is not related to the others (like that puzzle, where you are given 4 words and you have to cross out the word that doesn't fit in the group).
Is it possible to un-chain the Manuscript filetype option from the license under which the file is published? Or, at least, have a "New Composition (manuscript)" and "New Composition (typeset)" option available, although still that would prove to be problematic in case a composer who has had some of his works published wants to upload a score of his on IMSLP, as then a new option would have to be added, "New Composition (scans)", which would be a bit nonsensical, I think (i.e. to have three choices for "old" music, and three identical choices for "new" music - as what is 'new' and what is 'old' changes all the time, and when IMSLP increases further in size with the addition of evermore contemporary and modern composers, it will be problematic to retroactively change all the files)