The Zip Download button allows you to download multiple files, folders or entire data rooms as a single Zip file in the Web client:
If the file names of the downloaded elements contain umlauts and you open the downloaded Zip file on Windows 7 with the Zip unpacker integrated in Windows, (i.e. directly in the Explorer), the umlauts are distortedly displayed as special characters. However, only the file names are affected, not the file contents themselves.
This is a known issue with the Windows 7 built-in Zip software. The cause of the problem is not DRACOON.