File /etc/profile.d/kde.csh (kdesupport-1.1.1-1) is wrong.

kdesupport was downloaded from:
ftp://ftp.students.cs.unibo.it
/Mirrors/ftp.redhat.com/redhat/updates/6.0/

Installed file:
-----------------------------------------------------------
# KDE initialization script (csh)
if ( $?KDEDIR ) then
         if ( $KDEDIR == "/usr" ) then
         exit
         endif
endif
setenv KDEDIR /usr
kdepath="${KDEDIR}/bin"    #This is not a valid csh set
if ( echo ${PATH} | grep -q ${kdepath} ) then
  exit                     #The if statement is wrong
endif

setenv PATH "${kdepath}:${PATH}"
-----------------------------------------------------------

Edited file:
-----------------------------------------------------------
# KDE initialization script (csh) (MODIFIED)
if ( $?KDEDIR ) then
         if ( $KDEDIR == "/usr" ) then
         exit
         endif
endif
setenv KDEDIR /usr
echo ${PATH} | grep -q "${KDEDIR}/bin"
if ( $status == 0 ) then
  exit
endif
setenv PATH "${KDEDIR}/bin:${PATH}"
-----------------------------------------------------------
Note. I don't use the variable kdepath (see also kde.sh).
I hope this is ok.