Ghci fails to load modules, but ghc compiles OK

[Colin Paul Adams]

I've been using ghc 6.10.3 on 64-bit Linux to compile my application,
and it runs OK, modulo bugs.

I want to debug a problem, so I load it in ghci, but when i type main
I get:

 Loading package network-2.2.1.1 ... 

GHCi runtime linker: fatal error: I found a duplicate definition for symbol
   my_inet_ntoa
whilst processing object file
   /usr/lib64/ghc-6.10.3/network-2.2.1.1/HSnetwork-2.2.1.1.o
This could be caused by:
   * Loading two different object files which export the same symbol
   * Specifying the same object file twice on the GHCi command line
   * An incorrect `package.conf' entry, causing some object to be
     loaded twice.
GHCi cannot safely continue in this situation.  Exiting now.  Sorry.

Why would ghci have a problem, but not ghc?
-- 
Colin Adams
Preston Lancashire