I rebuilt the samba 3.0.6 sources on a Redhat 7.2 (kernel 2.4.20-27.7smp) like I did with the samba 3.0.5 sources, since there a no precompiled 3.0.x rpms for redhat 7.3 any more. In 3.0.5 smbcacls worked. Now, I get a segmentation fault, even starting smbcacls without any options. On another machine with fedora core 2 smbcacls (version 3.0.6) works without errors.
Created attachment 611 [details] strace output of smbcacls Here I provide a strace output of smbcacls.
Problem is solved by samba-3.0.8.
sorry for the same, cleaning up the database to prevent unecessary reopens of bugs.