Mac – Unable to install Meld via MacPorts 2.0.3 on OSX 10.6.8

I am trying to get Meld onto my OS X 10.6.8 box using MacPorts 2.0.3 and am not having success.

bobk-mbp:opt bobk$ port version
Version: 2.0.3
bobk-mbp:opt bobk$ sudo port install meld
--->  Computing dependencies for meld
--->  Dependencies to be installed: py26-gnome libgnomeui py26-gtk py26-cairo py26-numpy fftw-3 py26-nose py26-distribute python26 py26-py py26-gobject py26-orbit
--->  Building libgnomeui
Error: Target org.macports.build returned: shell command failed (see log for details)
Error: Failed to install libgnomeui
Log for libgnomeui is at: /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_gnome_libgnomeui/libgnomeui/main.log
Error: The following dependencies were not installed: py26-gnome libgnomeui py26-gtk py26-cairo py26-numpy fftw-3 py26-nose py26-distribute python26 py26-py py26-gobject py26-orbit
Error: Status 1 encountered during processing.
To report a bug, see <http://guide.macports.org/#project.tickets>

When I look at /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_gnome_libgnomeui/libgnomeui/main.log it has a line like…

:error:build Failed to install libgnomeui
:debug:build couldn't open "/System/Library/Frameworks/Tcl.framework/Versions/8.5/Resources/tclIndex": no such file or directory
    while executing
"open [file join $dir tclIndex]"
:notice:build Log for libgnomeui is at: /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_gnome_libgnomeui/libgnomeui/main.log

…and that file is indeed missing on my system. Where do I go from here? I really want a piece of that Meld goodness.

Why can't MacPorts install meld on my os x 10.6.8 box?