Non-Latin Unicode characters appear as ?? or are not shown

[MKaveh]

If a file or folder or APK file contains non-Latin Unicode characters, these characters appear as ???
and for APK files containing these characters in the file name, they don't even appear in Droid Explorer.
sample file names to check the bug: file/folder: e.g.: برنامه.txt
APK file: e.g., rename an apk to: برنامه.apk

I also found that even though files can be transferred to the device (by Drag n drop or Copy/Paste) but they can't be deleted or trasferred from device to PC.
When copying the file in device, it shows error "Illegal characters in path."

I wonder if this bug is because the program can't handle these characters at all or it's just because of using a font in program UI which doesn't support Unicode characters.