After upgrade bytestring to 0.9.1.3, my program cannot run.

Just a simple text process program. When I runhaskell it. I got:

GHCi runtime linker: fatal error: I found a duplicate definition for symbol
   fps_minimum
whilst processing object file
   ~/.cabal/lib/bytestring-0.9.1.3/ghc-6.8.3/HSbytestring-0.9.1.3.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.