[BUG] Fatal Error: Nonexistant page

[coulonnus]

I have created this Work page: http://imslp.org/wiki/Soir_d%27%C3%A9t% ... _Alphonse) When I fill the Add Files form and click the Submit! button I obtain:
Fatal Error: Nonexistant page.

[imslp]

Adding a file seems to work for me. Can you try again?

[coulonnus]

I obtained the error message again with IE, but it worked with Flock 1.2.7. This morning I sucessfully uploaded another piece with IE.

Before this I obtained also the error message when trying to upload another piece at this Catherine/Soir d'éte page. So the pdf is not the culprit