Hi leslie,
I can agree with what nick.leblanc suggested. Regaarding about using the Mavericks Server DNS for your clients. It makes a lot of sense in configuration of the clients.
I upgraded my test server and everything seems fine along with two of my clients for testing and no issues for login into network users accounts.
Reason why I had no issues login in was probably since my clients use the server as it's DNS and the your ISP. However it makes all perfect sense.
As a reverse test on what nick suggested. I set one of my mavericks clients using the ISP DNS and network login stopped working... even after I rebinded. I tested a mountain lion client using the ISP DNS and network login worked fined.
Regardless, it makes perfect sense since it seems mavericks is picky about the server name since even if you provide the IP of the server it does reverse IP lookup of the server. So if you are using your ISP DNS it might return some other name that's provided by your ISP for your broadband,.
LIke I've been saying FQDN and DNS setup is very important. I guess Mavericks clients now depends more importantly on it now for proper configuration.
Like Again it makes perfect sense when thinking about it when setting up home directories in Workgroup manager. Especially, when you have to setup the full path, server.yourdomain.net part of the full path......
If your clients are not using your server DNS then it can not find the path. For whatever reason, in Mavericks clients DNS is more important than in Mountain Lion clients.
If people are still having trouble logging as network users, let me know since individually I might be able to help with setup of your Server DNS and then get your clients to login using the Server DNS settings... etc etc..