I had Debian Lenny up and working with file sharing using samba and had changed the location of Windows Vista Documents (instead of being saved to Username\Documents it was now saved to \\KRAZY\Documents, which was located at /home/username/Documents). It was all working fine, then I did an upgrade and once I set the grub2 changes to take effect, the computer gave me error 15 before the grub screen, so I redid the computer this time with Slackware 13 64bit. I go to set up the users with useradd and I get
figuring it was the - I changed it to an underscore and got the same thing
I finally figured it out to be that useradd in the Slackware 13 distribution was not allowing me to create usernames that had capital letters in the name. If I changed the username to lower case I could have dashes or underscores what ever I wanted.

My question is if the Windows Vista machine has a username that has a capital letter in it will I be able to get it to map to the home directory on Slackware even though I changed it to lower case? or is there something I can do (fix or workaround) to get Slackware to accept usernames with capital letters?

Usernames under Windows are not case-sensitive, and neither are file/directory names, so it shouldn't matter.