1) var=value syntax doesn't work in csh
2) If the bad syntax is fixed, "if" bails out with
   "Expression Syntax."

Both of these problems mean my tcsh dot files don't get
run.

The relevant lines are flagged below with '*':
------------------------------------------------------------
# KDE initialization script (csh)
if ( $?KDEDIR ) then
         if ( $KDEDIR == "/usr" ) then
         exit
         endif
endif
setenv KDEDIR /usr
kdepath="${KDEDIR}/bin" *
if ( echo ${PATH} | grep -q ${kdepath} ) then *
  exit
endif

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

First line should read, 'set kdepath = "${KDEDIR}/bin"'
I'm not sure about the appropriate if syntax; maybe some
appropriately placed backtics would fix it.