Thread:Project:Support desk/Renaming/moving .wav files impossible, .ogg works

Hi, when I try to rename/move an uploaded .wav file, I get an error message telling me that the new file extension doesn't match the old one. But it's exactly the same, for example I want to rename "Sound.wav" to "Sound2.wav". However, doing the same with an .ogg file works perfectly. Why? How can I fix it?