diff -up gromacs-4.5.1/scripts/GMXRC.bash.cmakein.orig gromacs-4.5.1/scripts/GMXRC.bash.cmakein
--- gromacs-4.5.1/scripts/GMXRC.bash.cmakein.orig	2010-08-23 20:58:30.000000000 +0300
+++ gromacs-4.5.1/scripts/GMXRC.bash.cmakein	2010-10-25 17:11:05.955213941 +0300
@@ -8,8 +8,12 @@
 tmppath=""
 for i in `echo $LD_LIBRARY_PATH | sed "s/:/ /g"`; do
   if test "$i" != "$GMXLDLIB"; then
+    if test "${tmppath}" == ""; then
+      tmppath=$i
+    else
     tmppath=${tmppath}:$i
   fi
+  fi
 done
 LD_LIBRARY_PATH=$tmppath
 
@@ -38,6 +42,9 @@ for i in `echo $MANPATH | sed "s/:/ /g"`
     tmppath=${tmppath}:$i
   fi
 done
+if test "$tmppath" == ""; then
+    tmppath=":"
+fi
 MANPATH=$tmppath
 
 ##########################################################
diff -up gromacs-4.5.1/scripts/GMXRC.bash.in.orig gromacs-4.5.1/scripts/GMXRC.bash.in
--- gromacs-4.5.1/scripts/GMXRC.bash.in.orig	2010-08-23 20:58:30.000000000 +0300
+++ gromacs-4.5.1/scripts/GMXRC.bash.in	2010-10-25 17:11:05.955213941 +0300
@@ -8,8 +8,12 @@
 tmppath=""
 for i in `echo $LD_LIBRARY_PATH | sed "s/:/ /g"`; do
   if test "$i" != "$GMXLDLIB"; then
+    if test "${tmppath}" == ""; then
+      tmppath=$i
+    else
     tmppath=${tmppath}:$i
   fi
+  fi
 done
 LD_LIBRARY_PATH=$tmppath
 
@@ -38,6 +42,9 @@ for i in `echo $MANPATH | sed "s/:/ /g"`
     tmppath=${tmppath}:$i
   fi
 done
+if test "$tmppath" == ""; then
+    tmppath=":"
+fi
 MANPATH=$tmppath
 
 ##########################################################
diff -up gromacs-4.5.1/scripts/GMXRC.csh.cmakein.orig gromacs-4.5.1/scripts/GMXRC.csh.cmakein
--- gromacs-4.5.1/scripts/GMXRC.csh.cmakein.orig	2010-08-23 20:58:30.000000000 +0300
+++ gromacs-4.5.1/scripts/GMXRC.csh.cmakein	2010-10-25 17:11:05.955213941 +0300
@@ -16,7 +16,13 @@ if (! $?GMXMAN) setenv GMXMAN ""
 # remove previous gromacs part from ld_library_path
 set tmppath = ""
 foreach i ( `echo $LD_LIBRARY_PATH | sed "s/:/ /g"` )
-  if ( "$i" != "$GMXLDLIB" ) set tmppath = "${tmppath}:$i"
+  if ( "$i" != "$GMXLDLIB" ) then
+    if ("${tmppath}" == "") then
+      set tmppath = "$i"
+    else
+      set tmppath = "${tmppath}:$i"
+    endif
+  endif
 end
 setenv LD_LIBRARY_PATH $tmppath
 
@@ -39,6 +45,9 @@ set tmppath = ""
 foreach i ( `echo $MANPATH | sed "s/:/ /g"` )
   if ( "$i" != "$GMXMAN" ) set tmppath = "${tmppath}:$i"
 end
+if ("$tmppath" == "") then
+    set tmppath = ":"
+endif
 setenv MANPATH $tmppath
 
 ##########################################################
diff -up gromacs-4.5.1/scripts/GMXRC.csh.in.orig gromacs-4.5.1/scripts/GMXRC.csh.in
--- gromacs-4.5.1/scripts/GMXRC.csh.in.orig	2010-08-23 20:58:30.000000000 +0300
+++ gromacs-4.5.1/scripts/GMXRC.csh.in	2010-10-25 17:11:05.955213941 +0300
@@ -16,7 +16,13 @@ if (! $?GMXMAN) setenv GMXMAN ""
 # remove previous gromacs part from ld_library_path
 set tmppath = ""
 foreach i ( `echo $LD_LIBRARY_PATH | sed "s/:/ /g"` )
-  if ( "$i" != "$GMXLDLIB" ) set tmppath = "${tmppath}:$i"
+  if ( "$i" != "$GMXLDLIB" ) then
+    if ("${tmppath}" == "") then
+      set tmppath = "$i"
+    else
+      set tmppath = "${tmppath}:$i"
+    endif
+  endif
 end
 setenv LD_LIBRARY_PATH $tmppath
 
@@ -39,6 +45,9 @@ set tmppath = ""
 foreach i ( `echo $MANPATH | sed "s/:/ /g"` )
   if ( "$i" != "$GMXMAN" ) set tmppath = "${tmppath}:$i"
 end
+if ("$tmppath" == "") then
+    set tmppath = ":"
+endif
 setenv MANPATH $tmppath
 
 ##########################################################
diff -up gromacs-4.5.1/scripts/GMXRC.zsh.cmakein.orig gromacs-4.5.1/scripts/GMXRC.zsh.cmakein
--- gromacs-4.5.1/scripts/GMXRC.zsh.cmakein.orig	2010-08-23 20:58:30.000000000 +0300
+++ gromacs-4.5.1/scripts/GMXRC.zsh.cmakein	2010-10-25 17:11:05.955213941 +0300
@@ -8,8 +8,12 @@
 tmppath=""
 for i in `echo $LD_LIBRARY_PATH | sed "s/:/ /g"`; do
   if test "$i" != "$GMXLDLIB"; then
+    if test "${tmppath}" = ""; then
+      tmppath=$i
+    else
     tmppath=${tmppath}:$i
   fi
+  fi
 done
 LD_LIBRARY_PATH=$tmppath
 
@@ -38,6 +42,9 @@ for i in `echo $MANPATH | sed "s/:/ /g"`
     tmppath=${tmppath}:$i
   fi
 done
+if test "$tmppath" = ""; then
+    tmppath=":"
+fi
 MANPATH=$tmppath
 
 ##########################################################
diff -up gromacs-4.5.1/scripts/GMXRC.zsh.in.orig gromacs-4.5.1/scripts/GMXRC.zsh.in
--- gromacs-4.5.1/scripts/GMXRC.zsh.in.orig	2010-08-23 20:58:30.000000000 +0300
+++ gromacs-4.5.1/scripts/GMXRC.zsh.in	2010-10-25 17:11:05.955213941 +0300
@@ -8,8 +8,12 @@
 tmppath=""
 for i in `echo $LD_LIBRARY_PATH | sed "s/:/ /g"`; do
   if test "$i" != "$GMXLDLIB"; then
+    if test "${tmppath}" = ""; then
+      tmppath=$i
+    else
     tmppath=${tmppath}:$i
   fi
+  fi
 done
 LD_LIBRARY_PATH=$tmppath
 
@@ -38,6 +42,9 @@ for i in `echo $MANPATH | sed "s/:/ /g"`
     tmppath=${tmppath}:$i
   fi
 done
+if test "$tmppath" = ""; then
+    tmppath=":"
+fi
 MANPATH=$tmppath
 
 ##########################################################