On Windows NT or XP with Novell Client Login mvn.bat incorrectly selects OS as Win9x, because Novell sets OS environment variable to WINNT instead of Windows_NT.
As a result it processes command line arguments as in windows 9x, what is very inconvenient because all arguments with = (equals) sign must be quoted on command line. For example -DdownloadSources=true must be quoted as "-DdownloadSources=true".
The reason for such behaviour is that mvn.bat checks in several places if "%OS%"=="Windows_NT" and this statement yields false on windows with novell login. On winnt with novell login OS is set to WINNT instead of Windows_NT.
I attached corrected mvn.bat and mvnDebug.bat that check additionally for "%OS%"=="WINNT".