Hi, I was installing various haskell packages from hackage. When I was installing HaXml, I think it was complaining about Text.PrettyPrint.HughesPJ not installed or something. (can't remember the specific message and I can't reproduce now...) So I installed "pretty-1.0.0.0" package as well. Ever since then, when I try to install other haskell packages, I get the following error message: "brian@bp-desktop:~/Download/mtl-1.1.0.0$ runghc Setup.hs configure <interactive>: /usr/local/lib/ghc-6.8.2/lib/Cabal-1.2.3.0/HSCabal-1.2.3.0.o: unknown symbol `prettyzm1zi0zi0zi0_TextziPrettyPrintziHughesPJ_lvl18_closure' ghc-6.8.2: unable to load package `Cabal-1.2.3.0'" Does anyone know what the problem is? Currently installed packages are: ========= /usr/local/lib/ghc-6.8.2/package.conf: Cabal-1.2.3.0, HTTP-3001.0.4, HUnit-1.2.0.0, X11-1.4.1, array-0.1.0.0, base-3.0.1.0, bytestring-0.9.0.1, containers-0.1.0.1, directory-1.0.0.0, filepath-1.1.0.0, (ghc-6.8.2), haskell98-1.0.1.0, hpc-0.5.0.0, hxt-7.4, mtl-1.1.0.0, network-2.1.0.0, old-locale-1.0.0.0, old-time-1.0.0.0, packedstring-0.1.0.0, parsec-2.1.0.0, polyparse-1.1, pretty-1.0.0.0, process-1.0.0.0, random-1.0.0.0, readline-1.0.1.0, rts-1.0, template-haskell-2.2.0.0, unix-2.3.0.0, xmonad-0.5, xmonad-contrib-0.5 ========= Thank you, - Brian