The 'Interpunct'-character seems not be supported in filenames

[sonnatager]

Hi, I have following problem: If i try to drop a file with the filename 'Test ⋅ .png' the change output gives back a file with empty filename.

Tried this on your DEMO page. First file is OK with filename 'Test.png' and second file is the file with the name mentioned above:

There are also errors in the console:

I think the problem is the interpunct (Wiki) in the filename.