The file server is Novell Netware 6.5 SP5.
The NFS clients are Red Hat Enterprise 3 and Solaris 8
The problem is that when a filename contains certain characters, the Linux clients return the error 'unknown error 526' if you try and list the directory contents.
Solaris clients report the directory as being empty.
Windows clients see the directory perfectly fine.
If I copy said files off the server and onto some removable media using a Windows machine, and then mount that media on the Liunux clients, I get the expected '?' where said characters are.
So although the character support is clearly missing from the NFS clients, it seems to me as though the Netware servers are causing an extra problem that stops the direcory being accessed at all from the NFS clients.
The biggest issue is that if one of these files exists in a fiarly high level directory, it stops users seeing all subdirectories below it.
Any help is much appreciated as I am completely stumped.