NFS and the 2GB limit

[stan]

I'm setting up an Sun Ultra40 running the AMD64bit version of Ubuntu. 
Among other things, I copy over some _big_ Oracle data files. First
try today bailed at exactly 2GB. I checked the filesystem using dd
and I'm able to create files on that filesystem > 2G. I'm using userland
NFS.

What can I do to fix this?

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