[CentOS] mounting a CentOS 5.5-based NFS partitions from a Mac OS X machine

Hello listmates,

Yes, I know - Macs and NFS do not co-exist easily. Still I've got to
make this happen somehow.

In short - we have two CentOS-based NFS servers. They work fine with a
variety of Linux machines but when I try to mount them from a Mac OS X
10.5 or 10.6 machine I get nowhere. I.e., the Mac does not complain
yet reads nothing over the NFS.

Has anybody seen this? Does anybody know of a fix?

Thanks.

Boris.