[ubuntu] unable to upgrade 1.0.6 to 1.0.7

[Man-wai Chang]

As a newbie in debian, what's wrong here?

=== quote ===

(Reading database ... 79471 files and directories currently installed.)
Preparing to replace mozilla-firefox 1.0.6-1ubuntu1~5.04ubp1 (using
.../mozilla-firefox_1.0.7-0ubuntu0.1_i386.deb) ...
Unpacking replacement mozilla-firefox ...
root at server:/home/toylet #
aptitudept/archives/mozilla-firefox_1.0.7-0ubuntu0.1_i386.deb
(--unpack):ylet # aptitude
 trying to overwrite `/var/lib/mozilla-firefox/extensions.d/00classic',
which is also in package firefox
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Preparing to replace mozilla-firefox-gnome-support
1.0.6-1ubuntu1~5.04ubp1 (using
.../mozilla-firefox-gnome-support_1.0.7-0ubuntu0.1_i386.deb) ...
Unpacking replacement mozilla-firefox-gnome-support ...
dpkg: error processing
/var/cache/apt/archives/mozilla-firefox-gnome-support_1.0.7-0ubuntu0.1_i386.deb
(--unpack):
 trying to overwrite
`/usr/lib/mozilla-firefox/components/libmozgnome.so', which is also in
package firefox-gnome-support
Errors were encountered while processing:
 /var/cache/apt/archives/mozilla-firefox_1.0.7-0ubuntu0.1_i386.deb
 /var/cache/apt/archives/mozilla-firefox-gnome-support_1.0.7-0ubuntu0.1_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
Ack!  Something bad happened while installing packages.  Trying to recover:
Press return to continue.

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