Unable to apt-get 'gnome-core-devel'

I got it to work using the following:
##############################
aptitude install gnome-core-devel
Reading package lists... Done
Building dependency tree... Done
Reading extended state information
Initializing package states... Done
Building tag database... Done
The following packages are BROKEN:
  libdbus-1-dev
The following NEW packages will be automatically installed:
  autoconf automake1.4 autotools-dev docbook docbook-dsssl docbook-to-man docbook-xsl gnome-common gtk-doc-tools intltool jade libart-2.0-dev
  libatspi-dev libavahi-client-dev libavahi-common-dev libavahi-glib-dev libbonobo2-dev libbonoboui2-dev libbz2-dev libcompress-zlib-perl libcroco3-dev
  libeel2-dev libfont-afm-perl libgail-dev libgconf2-dev libgcrypt11-dev libglade2-dev libgnome-desktop-dev libgnome-keyring-dev libgnome-menu-dev
  libgnome2-dev libgnomecanvas2-dev libgnomeprint2.2-dev libgnomeprintui2.2-dev libgnomeui-dev libgnomevfs2-dev libgnutls-dev libgpg-error-dev
  libgsf-1-dev libgtksourceview-dev libhtml-format-perl libhtml-parser-perl libhtml-tagset-perl libhtml-tree-perl libidl-dev libltdl3 libltdl3-dev
  libmailtools-perl libnautilus-extension-dev libopencdk8-dev liborbit2-dev libpanel-applet2-dev librsvg2-dev libsp1c2 libstartup-notification0-dev
  libtasn1-2-dev libtimedate-perl libtool liburi-perl libwww-perl libxml-parser-perl libxml2-dev libxslt1-dev m4 orbit2 sp
The following NEW packages will be installed:
  autoconf automake1.4 autotools-dev docbook docbook-dsssl docbook-to-man docbook-xsl gnome-common gnome-core-devel gtk-doc-tools intltool jade
  libart-2.0-dev libatspi-dev libavahi-client-dev libavahi-common-dev libavahi-glib-dev libbonobo2-dev libbonoboui2-dev libbz2-dev libcompress-zlib-perl
  libcroco3-dev libeel2-dev libfont-afm-perl libgail-dev libgconf2-dev libgcrypt11-dev libglade2-dev libgnome-desktop-dev libgnome-keyring-dev
  libgnome-menu-dev libgnome2-dev libgnomecanvas2-dev libgnomeprint2.2-dev libgnomeprintui2.2-dev libgnomeui-dev libgnomevfs2-dev libgnutls-dev
  libgpg-error-dev libgsf-1-dev libgtksourceview-dev libhtml-format-perl libhtml-parser-perl libhtml-tagset-perl libhtml-tree-perl libidl-dev libltdl3
  libltdl3-dev libmailtools-perl libnautilus-extension-dev libopencdk8-dev liborbit2-dev libpanel-applet2-dev librsvg2-dev libsp1c2
  libstartup-notification0-dev libtasn1-2-dev libtimedate-perl libtool liburi-perl libwww-perl libxml-parser-perl libxml2-dev libxslt1-dev m4 orbit2 sp
0 packages upgraded, 68 newly installed, 0 to remove and 0 not upgraded.
Need to get 14.3MB of archives. After unpacking 59.7MB will be used.
The following packages have unmet dependencies:
  libdbus-1-dev: Depends: libdbus-1-2 (= 0.60-6ubuntu8) but 0.60-6ubuntu9 is installed.
Resolving dependencies...
The following actions will resolve these dependencies:

Downgrade the following packages:
libdbus-1-2 [0.60-6ubuntu9 (now) -> 0.60-6ubuntu8 (dapper)]

Score is -40

Accept this solution? [Y/n/q/?] y
The following NEW packages will be automatically installed:
  autoconf automake1.4 autotools-dev docbook docbook-dsssl docbook-to-man docbook-xsl gnome-common gtk-doc-tools intltool jade libart-2.0-dev
  libatsp...

Thanks for your bug report. Can you attach the output of sudo apt-get install libeel2-dev (follow down the dependencies)?

Good day! Sorry for the long reply but I was on holidays!
Here's the output:
###################################
tom@tomi:~$ sudo apt-get install libeel2-dev
Reading package lists... Done
Building dependency tree... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.

Since you only requested a single operation it is extremely likely that
the package is simply not installable and a bug report against
that package should be filed.
The following information may help to resolve the situation:

The following packages have unmet dependencies.
  libeel2-dev: Depends: libgnomevfs2-dev (>= 2.9.1) but it is not going to be installed
               Depends: libgnomecanvas2-dev (>= 2.6.0) but it is not going to be installed
               Depends: libgnomeui-dev (>= 2.6.0) but it is not going to be installed
               Depends: libgail-dev (>= 1.4) but it is not going to be installed
               Depends: libgnome-menu-dev (>= 2.9.1) but it is not going to be installed
               Depends: libgnome-desktop-dev (>= 2.1.4) but it is not going to be installed
E: Broken packages
#####################################

Hi there, I followed the deps down a bit more, this is where it wouldn't get any further (I'm not the original poster so my system may be a bit different, and I do use Xgl from berookid):

---------------------------------------------------------------------------------------------
root@stark:~# apt-get install libatspi-dev libeel2-dev libgnomeprintui2.2-dev libgnomeprint2.2-dev libnautilus-extension-dev libgail-dev libgtk2.0-dev libpanel-applet2-dev libpango1.0-dev libglade2-dev libgnomeui-dev librsvg2-dev libgtksourceview-dev libcairo2-dev libfreetype6-dev libxft-dev libfontconfig1-dev libcairo2-dev
Reading package lists... Done
Building dependency tree... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  libcairo2-dev: Depends: libcairo2 (= 1.0.4-0ubuntu1) but 1.2.2-0ubuntu2 is to be installed
  libfontconfig1-dev: Depends: libfontconfig1 (= 2.3.2-1.1ubuntu12) but 2.3.2-7ubuntu1 is to be installed
  libfreetype6-dev: Depends: libfreetype6 (= 2.1.10-1ubuntu2.2) but 2.2.1-0ubuntu1 is to be installed
E: Broken packages
---------------------------------------------------------------------------------------------

Can you all attach your /etc/fstab to the bug please?

I believe I understand why this is happening:

Lets say for an example that U are using XGL from the QUINNS' repo! Such as I was. And so by installing XGL from it, U are upgrading a lot of other libraries, that your system depends on them. All is is good until some packages or applications won't work with newer libraries, like GNOME-CORE-DEVEL. These packages require the older LIBRARIES to work but XGL requires the new ones!

See the dillema?

##################
Can anyone confirm/deny this? Cos I've never quite understood why is it a problem installing newer LIBS and adding other REPOS until this explanation came into my mind?

Well if this explanation is true than am gonna post it on UBUNTUFORUMS.ORG since am sure that a lot of fellow UBUNTUERs have been wondering the same thing.

We had a bunch of people who had problems with this. Did you manage to fix your problems again?

As described in the previous comments, your report lacks the information we need to investigate the problem further. We'll close this report for now - please reopen it if you can give us the missing information.