Index: openacs-4/packages/acs-templating/tcl/apm-callback-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-templating/tcl/apm-callback-procs.tcl,v
diff -u -N -r1.4.4.1 -r1.4.4.2
--- openacs-4/packages/acs-templating/tcl/apm-callback-procs.tcl	24 Jul 2009 14:12:31 -0000	1.4.4.1
+++ openacs-4/packages/acs-templating/tcl/apm-callback-procs.tcl	22 Apr 2010 08:13:51 -0000	1.4.4.2
@@ -61,12 +61,14 @@
                                  -package_id $package_id_templating \
                                  -parameter "XinhaDefaultPlugins" \
                                  -default ""]
-                set del_pos [lsearch $plugins FullScreen]
-                set plugins [lreplace $plugins $del_pos $del_pos]
-                parameter::set_value \
-                    -package_id $package_id_templating \
-                    -parameter "XinhaDefaultPlugins" \
-                    -value $plugins 
+                if { $plugins ne "" } {
+		    set del_pos [lsearch $plugins FullScreen]
+		    set plugins [lreplace $plugins $del_pos $del_pos]
+		    parameter::set_value \
+			-package_id $package_id_templating \
+			-parameter "XinhaDefaultPlugins" \
+			-value $plugins 
+                }
             }
         }
 }