Have been running V4.1.2 server with 10 assorted Win machines on a network (Win95, Win98, WinME) - running perfectly for months. Yesterday upgraded - no problem with upgrade itself, but after that some Win machines unable to browse the server - strange variations - one machine asks for Password IPC$ mentioned, others work OK. One particular multiuser software, which had its databases on the linux box, just crashes now, while another (based on MSAccess) runs OK. Prior to e-smith we had Linux Redhat5.2 running OK but it also had the same problems which we eventually sorted, I think by altering ownership of files - trouble is can't remember what!..... What has changed between V4 and V5 to alter permissions??