Running 4.6.5 on RedHat 5.1 2.0.34 we get the following:

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[root_at_codahost potemkin]# ./potemkin -rd /tmp -v
User id is: 0
argv[1]: -rd
argv[3]: -v
Opcode 2        Uniqe 30
Returning root: fid (1.2.2)
coda_read_super: rootfid is (1, 2, 2)
Opcode 7        Uniqe 31
Doing getattr for fid (1.2.2)
coda_fetch_inode: inode called with i_ino = 0
coda_read_super: rootinode is 0 dev 2
Interval - no message
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And from other screen we try to see the /coda and it doesn't appear
as a directory, but instead:
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[root_at_codahost potemkin]# ls -l /coda
--------w-   0 daemon   root            0 Dec 31  1969 /coda
[root_at_codahost potemkin]#
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We have the Coda server running and the coda module installed.
Some idea of what to look for?
tia,
Sergio/Paola.