duplicate loading?

[S.D.Mechveliani]

Dear  ghc-5.02.2  (linux-i386-unknown, binary snapshot for libc.2.1),

Unlike  ghc-5.00,  you cannot load my project:

  -------------------------------------------------------------------
  making package, project, preparing  ...export/HSdocon.o libHSdocon.a 
  ...
  ghci -package docon T_ 
  ...
  Loading package concurrent ... linking ... done.
  Loading package posix ... linking ... done.
  Loading package util ... linking ... done.
  Loading package data ... linking ... done.
  Loading package docon ...

  GHCi runtime linker: warning: looks like you're trying to load the
  same object file twice:
   /home/mechvel/docon/2.03/docon/source/export/HSdocon.o
  GHCi will continue, but a duplicate-symbol error may shortly follow.

  GHCi runtime linker: fatal error: I found a duplicate definition for symbol
   UPolzu_pFromVec_closure
  whilst processing object file
   /home/mechvel/docon/2.03/docon/source/export/HSdocon.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.
  -------------------------------------------------------------------


Does this mean that the project has error which is detected by 5.02.2
and was not detected by 5.00 ? 

If you need the source, tell me the address to send personally the 
archive to.

-----------------
Serge Mechveliani
mechvel at botik.ru