BUG in HAskell! Help! Bad interface file: IO.hi

[fidan at informatik.uni-bremen.de]

   ___         ___ _
   / _ \ /\  /\/ __(_)
  / /_\// /_/ / /  | |      GHC Interactive, version 6.6, for Haskell 98.
/ /_\\/ __  / /___| |      http://www.haskell.org/ghc/
\____/\/ /_/\____/|_|      Type :? for help.

Loading package base ... linking ... done.

<interactive>:1:84:
     Bad interface file: IO.hi
         IO.hi: openBinaryFile: does not exist (No such file or directory)
ghc-6.6: panic! (the 'impossible' happened)
   (GHC version 6.6 for i386-unknown-solaris2):
         interactiveUI:flush

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

z03->uname -a
SunOS z03 5.10 Generic_118855-19 i86pc i386 i86pc
z03->cat/etc/motd
bash: cat/etc/motd: No such file or directory
z03->gcc -v
Using built-in specs.
Target: i386-pc-solaris2.10
Configured with: ../gcc-4.0.3/configure --prefix=/usr/local/lang  
-program-suffix=_4.0.3 --enable-64bit --with-gnu-as  
--with-as=/usr/local/bin/gnu-as --with-ld=/usr/ccs/bin/ld  
--enable-version-specific-runtime-libs --enable-languages=c :  
(reconfigured) ../gcc-4.0.3/configure --prefix=/usr/local/lang  
-program-suffix=_4.0.3 --enable-64bit --with-gnu-as  
--with-as=/usr/local/bin/gnu-as --with-ld=/usr/ccs/bin/ld  
--enable-version-specific-runtime-libs --enable-languages=c,c++
Thread model: posix
gcc version 4.0.3