To upgrade to 3.0 release, I donwload base.tgz, comp.tgz, ...
and extract them except etc.tgz:
# cd /
# tar zxf /path/base.tgz
# tar zxf /path/comp.tgz
# ...
When all is done, I found non-root account can't use su, netstat,ping...

I notice the correct is:
-r-sr-xr-x  1 root  wheel  17936 Dec 24 17:42 /usr/bin/su

But mine is 
-r-xr-xr-x  1 root  wheel  17936 Dec 19 08:24 /usr/bin/su

So I have 2 questions:
1) what step I lost in upgrading?
2) I can change the file manually by chmod, but what is files names list?