Systems are openSUSE 13.2, KDE, both 32-bit and 64-bit

With samba 4.2.4-34.1, in Dolphin when I do Network->Samba Shares->(workgroup name)->(name of Windows 10 machine), an authentication window appears wanting user name and password. The Windows 10 machine does have a user name, but no password. No matter what I put in the authentication fields, access is denied.

Running samba 4.1.23-31.1, in Dolphin I could click Network->Samba Shares->(workgroup name)->(name of Windows 10 machine) and got a list of six folders, one of which is shared. Clicking the shared folder, I'm in with read and write access. No authentication window appears.

Samba 4.2.4-34.1 will access openSUSE systems with passwords, and Windows 10 systems with passwords, but for the Windows 10 system with no password, access is denied. This problem does not occur with samba 4.1.23-31.1