I am also receiving this error on Fedora Core 4.
I am attempting to install the open source edition, but it doesn't seem to go beyond this message. Does this install need a 32-bit server vs a 64-bit?
Code:
Checking for prerequisites...
NPTL...FOUND
sudo...FOUND sudo-1.6.8p8-2.4
libidn...FOUND libidn-0.5.15-1
libidn-0.5.15-1
curl...FOUND curl-7.13.1-5
curl-7.13.1-5
fetchmail...FOUND fetchmail-6.2.5.5-1
gmp...FOUND gmp-4.1.4-6
gmp-4.1.4-6
/usr/lib/libstdc++.so.5...FOUND
Checking for required space...
Checking for installable packages
Found zimbra-core
Error: attempting to install i386 packages on a x86_64 OS.
Exiting...