clarified JEDIT_JAVA_OPTIONS vs. JEDIT_SYSTEM_OPTIONS -- discontinued JEDIT_APPLE_PROPERTIES;
static default Dactors.corePoolSize=4 for more reproducible concurrency, independently of number of cores;

--- a/src/Tools/jEdit/dist-template/etc/settings	Mon Aug 09 22:02:26 2010 +0200
+++ b/src/Tools/jEdit/dist-template/etc/settings	Tue Aug 10 12:08:24 2010 +0200
@@ -3,10 +3,10 @@
 JEDIT_HOME="$COMPONENT"
 JEDIT_SETTINGS="$ISABELLE_HOME_USER/jedit"
 
-JEDIT_APPLE_PROPERTIES="-Dapple.laf.useScreenMenuBar=true -Dcom.apple.mrj.application.apple.menu.about.name=Isabelle/jEdit"
-JEDIT_JAVA_OPTIONS="-Xms128m -Xmx512m -Xss2m $JEDIT_APPLE_PROPERTIES"
-#JEDIT_JAVA_OPTIONS="-server -Xms128m -Xmx1024m -Xss4m $JEDIT_APPLE_PROPERTIES"
 JEDIT_OPTIONS="-reuseview -noserver -nobackground"
+JEDIT_JAVA_OPTIONS="-Xms128m -Xmx512m -Xss2m -Dactors.corePoolSize=4"
+#JEDIT_JAVA_OPTIONS="-server -Xms128m -Xmx1024m -Xss4m -Dactors.corePoolSize=8"
+JEDIT_SYSTEM_OPTIONS="-Dapple.laf.useScreenMenuBar=true -Dcom.apple.mrj.application.apple.menu.about.name=Isabelle/jEdit"
 
 JEDIT_STYLE_SHEETS="$ISABELLE_HOME/lib/html/isabelle.css:$JEDIT_HOME/etc/isabelle-jedit.css:$ISABELLE_HOME_USER/etc/isabelle.css:$ISABELLE_HOME_USER/etc/isabelle-jedit.css"
 

--- a/src/Tools/jEdit/dist-template/lib/Tools/jedit	Mon Aug 09 22:02:26 2010 +0200
+++ b/src/Tools/jEdit/dist-template/lib/Tools/jedit	Tue Aug 10 12:08:24 2010 +0200
@@ -76,7 +76,7 @@
   done
 }
 
-declare -a JAVA_ARGS; eval "JAVA_ARGS=($JEDIT_JAVA_OPTIONS)"
+declare -a JAVA_ARGS; eval "JAVA_ARGS=($JEDIT_JAVA_OPTIONS $JEDIT_SYSTEM_OPTIONS)"
 [ -n "$SCALA_HOME" ] && JAVA_ARGS["${#JAVA_ARGS[@]}"]="-Dscala.home=$SCALA_HOME"
 
 declare -a ARGS; eval "ARGS=($JEDIT_OPTIONS)"