The Duplicate IP Addresses feature always displays 0.0.0.0 for the subnet mask. Please see the picture below.
I am using a DLink DUB-E100 USB 2 Ethernet adapter. The function itself works in the software, but displays wrong. My subnet is 255.255.255.0 (see picture).
We are running WinPCap v4.1.3.
Windows 7 Enterprise SP1, Network Scanner v7.1.6