I can confirm that this happens with multiple spaces in the name. This warning makes sense in the classic uploader, but should not happen in the UploadWizard, as here the user has the possiblity to rename the file. Also, merging multiple whitespaces could be done automatically, without user intervention.

drecodeam wrote:

@erik i tried to reproduce it, but it does not show an error in my case.
i named the file as "foo bar test sample.jpg", and it was working fine.
I even tried 'foo#bar.jpg', it works fine.
I think that it has been solved in one of the updates, i am looking into the code, but can you confirm if this problem still persists.

Yeah, can't reproduce anymore either. This seems to have been fixed somewhere along the way, yay.