Cannot run cmd command lines from GIT bash

HI, I have just installed GIT from Git-1.9.4-preview20140815.exe having previously been using Git-1.9.2-preview20140411.exe I now find that some scripts I have been using for some time are no longer working correctly.

It seems that now I cannot pass parameters through to a DOS  command e.g. 
    net user <username> /DOMAIN

used to return full information about the user, now it just returns username not found, which is the behaviour
if it is invoked without the /DOMAIN switch. I have seen similar with other commands, an even simpler example would be
   cmd /c dir

This should run the DOS dir command, but all it does is invoke cmd.exe  interactively

Alex Dickson, IESD, Mentor Graphics, Newbury, UK. phone:+44 1635 811429,        fax:+44 1635 810102 mailto:alex_dickson@mentor.com, http://www.mentor.com