determining which package is 'responsible' for forcing a downgrade ?

[snowcrash+smart]

> It looks to me like there's an "obsoletes" relation there.

hm. ok. what tells you that from the output?

> Can you
> please run the command "smart query --show-all" on your installed
> package to see what it will tell us?

here you go :-)

/root# smart query MozillaThunderbird --show-all --installed
...
MozillaThunderbird-1.99.1-44.1 at i586 {5} [myDB] - The Stand-Alone
Mozilla Mail Component
  Provides:
    MozillaThunderbird = 1.99.1-44.1 at i586
    libenigmime.so
    libenigmime.so(EXPORTED)
    libenigmime.so(libenigmime.so)
    libimgicon.so
    libimgicon.so(EXPORTED)
    libimgicon.so(libimgicon.so)
    libjsd.so
    libjsd.so(EXPORTED)
    libjsd.so(libjsd.so)
    libldap50.so
    libmozgnome.so
    libmozgnome.so(EXPORTED)
    libmozgnome.so(libmozgnome.so)
    libmozjs.so
    libmyspell.so
    libmyspell.so(EXPORTED)
    libmyspell.so(libmyspell.so)
    libprldap50.so
    libspellchecker.so
    libspellchecker.so(EXPORTED)
    libspellchecker.so(libspellchecker.so)
    libxpcom.so
      Required By:
        blam-1.8.2-66 at i586 (libxpcom.so)
        epiphany-extensions-2.16.1-29 at i586 (libxpcom.so)
        yelp-2.16.1-30 at i586 (libxpcom.so)
    libxpcom_compat.so
    libxpcom_core.so
    libxpinstall.so
    libxpinstall.so(EXPORTED)
    libxpinstall.so(libxpinstall.so)
    libxpistub.so
  Requires:
    /bin/sh [pre]
      Provided By:
        bash-3.1-55 at i586 (/bin/sh)
    fileutils [pre]
        coreutils-6.4-10 at i586 (fileutils)
    libstdc++ [pre]
        libstdc++41-4.1.2_20061115-5 at i586 (libstdc++ = 4.1.2_20061115-5)
    textutils [pre]
        coreutils-6.4-10 at i586 (textutils)
  Upgrades:
    MozillaThunderbird < 1.99.1-44.1 at i586