/etc/profile.d/kde.csh has the following incorrect line:

if ( `echo ${PATH} | grep -q ${kdepath}` ) then

Since grep -q never generates output, the value interpolated by the
backticks will always be the empty string. Presumably braces were intended,
but these don't work properly for pipelines, so the best solution is
probably to apply the following patch:

--- kdesupport-1.1.2/scripts/kde.csh.orig       Mon Jul 12 13:38:02 1999
+++ kdesupport-1.1.2/scripts/kde.csh    Thu Dec  9 12:11:08 1999
@@ -6,7 +6,8 @@
 endif
 setenv KDEDIR @KDEPREFIX@
 set kdepath="${KDEDIR}/bin"
-if ( `echo ${PATH} | grep -q ${kdepath}` ) then
+echo ${PATH} | grep -q ${kdepath}
+if ( $status == 0 ) then
   exit
 endif