[gentoo-user] Problem with update world

[Massimiliano Ziccardi <massimiliano.ziccardi@gmail.com>]

Hi all!

Sorry to bother you again : it was a long time!

I've again one problem I'm not sure I can easily solve...

Today, I did:

emerge -upD --newuse world

but I got an error:

These are the packages that would be merged, in reverse order:

Calculating dependencies  .... done!
[ebuild   R   ] media-libs/swfdec-0.8.4  USE="ffmpeg*"
[ebuild   R   ] app-cdr/k3b-1.68.0_alpha3  USE="ffmpeg*"
[ebuild     U ] www-client/mozilla-firefox-3.5.4 [3.0.14] USE="alsa%*
-sqlite%" LINGUAS="-as% -bn_BD% -es_CL% -es_MX% -fa% -hr% -kk% -ml%
-or% -rm% -ta% -ta_LK% -vi%"
[ebuild   R   ] media-video/vlc-1.0.2  USE="ffmpeg*"
[nomerge      ] sys-apps/hal-0.5.13-r2 [0.5.12_rc1-r8]
[ebuild     U ]  app-misc/hal-info-20090716 [20090414]
[ebuild     U ] sys-apps/busybox-1.14.2 [1.13.2]
[ebuild     U ] sys-apps/hal-0.5.13-r2 [0.5.12_rc1-r8]
[nomerge      ] media-video/vlc-1.0.2  USE="ffmpeg*"
[ebuild     U ]  net-libs/xulrunner-1.9.1.4 [1.9.0.14] USE="alsa%*
python%* -debug% -sqlite%"
[nomerge      ] media-libs/swfdec-0.8.4  USE="ffmpeg*"
[ebuild  N    ]  media-plugins/gst-plugins-ffmpeg-0.10.7
[ebuild     U ] sys-fs/udev-146-r1 [141] USE="-devfs-compat% -extras%"
[nomerge      ] kde-base/kdm-4.3.1-r2
[nomerge      ]  x11-libs/qt-qt3support-4.5.3
[nomerge      ]   x11-libs/qt-sql-4.5.3
[ebuild     U ]    dev-db/mysql-5.0.84-r1 [5.0.70-r1] USE="-community%
-profiling%"
[blocks B     ] sys-fs/device-mapper ("sys-fs/device-mapper" is
blocking sys-fs/udev-146-r1)

 * Error: The above package list contains packages which cannot be
 * installed at the same time on the same system.

  ('ebuild', '/', 'sys-fs/udev-146-r1', 'merge') pulled in by
    >=sys-fs/udev-117 required by ('ebuild', '/',
'sys-apps/hal-0.5.13-r2', 'merge')
    sys-fs/udev required by ('installed', '/',
'sys-kernel/gentoo-sources-2.6.30-r8', 'nomerge')
    >=sys-fs/udev-124 required by ('installed', '/',
'sys-fs/cryptsetup-1.0.6-r2', 'nomerge')
    (and 2 more)

  ('installed', '/', 'sys-fs/device-mapper-1.02.24-r1', 'nomerge') pulled in by
    >=sys-fs/device-mapper-1.00.07-r1 required by ('installed', '/',
'sys-fs/cryptsetup-1.0.6-r2', 'nomerge')


Have you an idea about how to solve this?
Should I unmask a new version of 'device-mapper'?

My package.keywords and package.unmask are empty.

Thanks.

Massimiliano