clock@kestrel:~$ mged
Initializing and backgrounding, please wait...Itcl_Init error Can't find a usabl
e itcl.tcl in the following directories:
    /usr/brlcad/lib/itcl3.3 /usr/brlcad/bin/../lib/itcl3.3 /usr/brlcad/bin/../li
brary /usr/brlcad/bin/../../library /usr/brlcad/bin/../../itcl/library /usr/brlc
ad/bin/../../../itcl/library /usr/brlcad/bin/../../../../itcl/library /usr/brlca
d/bin/../../../../../itcl/library /usr/brlcad/bin/src/other/incrTcl/itcl/library
 /usr/brlcad/bin/../src/other/incrTcl/itcl/library /usr/brlcad/bin/../../src/oth
er/incrTcl/itcl/library /usr/brlcad/bin/../../../src/other/incrTcl/itcl/library 
/usr/brlcad/bin/../../../../src/other/incrTcl/itcl/library /usr/brlcad/bin/../..
/../../../src/other/incrTcl/itcl/library
This probably means that Itcl/Tcl weren't installed properly.
If you know where the Itcl library directory was installed,
you can set the environment variable ITCL_LIBRARY to point
to the library directory.

Done
Can't find a usable itk.tcl in the following directories:
    /usr/brlcad/lib/itk3.3 /usr/brlcad/bin/../lib/itk3.3 /usr/brlcad/bin/../libr
ary /usr/brlcad/bin/../../library /usr/brlcad/bin/../../itk/library /usr/brlcad/
bin/../../../itk/library /usr/brlcad/bin/../../../../itk/library /usr/brlcad/bin
/../../../../../itk/library /usr/brlcad/bin/src/other/incrTcl/itk/library /usr/b
rlcad/bin/../src/other/incrTcl/itk/library /usr/brlcad/bin/../../src/other/incrT
cl/itk/library /usr/brlcad/bin/../../../src/other/incrTcl/itk/library /usr/brlca
d/bin/../../../../src/other/incrTcl/itk/library /usr/brlcad/bin/../../../../../s
rc/other/incrTcl/itk/library
This probably means that Itcl/Itk weren't installed properly.
If you know where the Itk library directory was installed,
you can set the environment variable ITK_LIBRARY to point
to the library directory.

MGED Aborted.
clock@kestrel:~$ echo $PATH
/usr/local/geda/bin:/home/clock/bin:/usr/local/sbin:/usr/games:/usr/brlcad/bin:/bin:/usr/bin:/usr/sbin:/usr/X11R6/bin:/usr/local/bin:/sbin:.