diff --git a/frontend/xorriso-tcltk b/frontend/xorriso-tcltk
index 20b3c4b0..18df362c 100755
--- a/frontend/xorriso-tcltk
+++ b/frontend/xorriso-tcltk
@@ -2474,10 +2474,13 @@ proc browse_tree_select {adr_var_name tr selected} {
 # The command to be executed when the user double-clicks a node.
 #
 proc browse_tree_accept {adr_var_name do_return tr selected} {
+  global have_bwidget
   global extract_to_adr insert_from_adr burn_write_image_adr isodir_adr
   global isomanip_move_target indev_adr outdev_adr cmd_log_target
   global debug_log_file execute_script_adr
 
+  # Caution: Before using $tr, check for $have_bwidget
+
   if {[llength $selected] > 1} {
     xorriso_tcltk_errmsg "xorriso-tcltk : SORRY : You may only select a single file"
     return ""
@@ -2613,11 +2616,14 @@ proc browse_tree_up {adr_var_name tr which_fs} {
     xorriso_tcltk_errmsg "xorriso-tcltk : SORRY : You must select a single tree item before clicking the \"Up\" button."
     return ""
   }
-  set adr [file dirname [lindex $selected 0]]
-  eval set mem $$adr_var_name
-  set $adr_var_name $adr
-  browse_tree_populate $which_fs
-  set $adr_var_name $mem
+  set old_adr [lindex $selected 0]
+  set adr [file dirname $old_adr]
+  catch {
+    $tr see $adr
+    if {[$tr nodes $old_adr 0] != ""} {
+      $tr closetree $old_adr
+    }
+  }
   if {$adr != "/" && $adr != ""} {
     $tr selection clear
     $tr selection set $adr
@@ -2637,11 +2643,15 @@ proc browse_tree_down {adr_var_name tr which_fs} {
     return ""
   }
   set adr [lindex $selected 0]
-  eval set mem $$adr_var_name
-  set $adr_var_name $adr
-  browse_tree_populate $which_fs
-  set $adr_var_name $mem
-  $tr selection set $adr
+  if {$which_fs == "isofs"} {
+    browse_iso_open_dir $tr $adr
+  } else {
+    browse_disk_open_dir $tr $adr
+  }
+  catch {
+    $tr opentree $adr 0
+    $tr see $adr
+  }
 }
 
 
@@ -2657,12 +2667,15 @@ proc browse_tree_close_dir {tr name} {
 # obtained current state down to the current address in the field variable.
 #
 proc browse_tree_populate {which_fs} {
+  global have_bwidget
   global browse_disk_window_var browse_iso_window_var
   global browse_iso_window_is_active browse_disk_window_is_active
   global extract_to_adr insert_from_adr burn_write_image_adr isodir_adr
   global isomanip_move_target indev_adr outdev_adr cmd_log_target
   global debug_log_file execute_script_adr
 
+  if {$have_bwidget != 1} {return ""}
+
   if {$which_fs == "isofs"} {
     if {$browse_iso_window_is_active == 0} {return ""}
     set w {.browse_iso_window}
@@ -4539,7 +4552,7 @@ See man xorriso for the meaning of the commands.
 
 The \"Allow extract to disk\" switch controls whether commands like -extract
 are allowed in command scripts. If disabled, then command -osirrox is used
-to temporarily block those commands (unless the script ublocks itself, which
+to temporarily block those commands (unless the script unblocks itself, which
 would be nasty behavior).
 
 The item \"Permanently ban extraction\" disables -extract irrevocably for
@@ -5794,6 +5807,8 @@ proc setup_by_args {argv0 argv} {
   catch {set main_window_geometry $geometry}
 
   set connection_defined 0
+  set pipe_logging 0
+  set script_logging 0
 
   set loop_limit [llength $argv]
   for {set i 0} {$i < $loop_limit} {incr i} {
@@ -5841,24 +5856,16 @@ proc setup_by_args {argv0 argv} {
     if {$opt == "--pipe_log_file"} {
       set ok "1"
       incr i
-      set name [lrange $argv $i $i]
-      set ret [start_debug_logging $name 1]
-      if {$ret <= 0} {
-        puts stderr \
-           "$argv0 : Cannot open --pipe_log_file '$debug_log_file' for writing"
-        central_exit 2
-      }
+      set pipe_log_name [lrange $argv $i $i]
+      # postpone actual log start until start_xorriso has been passed
+      set pipe_logging 1
     }
     if {$opt == "--script_log_file"} {
       set ok "1"
       incr i
-      set name [lrange $argv $i $i]
-      set ret [start_command_logging $name 1]
-      if {$ret <= 0} {
-        puts stderr \
-                   "$argv0 : Cannot open --script_log_file '$name' for writing"
-        central_exit 2
-      }
+      set script_log_name [lrange $argv $i $i]
+      # postpone actual log start until start_xorriso has been passed
+      set script_logging 1
     }
     if {$opt == "--no_bwidget"} {
       set ok "1"
@@ -5880,6 +5887,23 @@ proc setup_by_args {argv0 argv} {
     set cmd_conn stdout
     set reply_conn stdin
   }
+  if {$pipe_logging == 1} {
+    set ret [start_debug_logging $pipe_log_name 1]
+    if {$ret <= 0} {
+      puts stderr \
+           "$argv0 : Cannot open --pipe_log_file '$pipe_log_name' for writing"
+      central_exit 2
+    }
+  }
+  if {$script_logging == 1} {
+    set ret [start_command_logging $script_log_name 1]
+    if {$ret <= 0} {
+      puts stderr \
+        "$argv0 : Cannot open --script_log_file '$script_log_name' for writing"
+      central_exit 2
+    }
+  }
+
   if {$main_window_geometry != ""} {
     wm geometry . $main_window_geometry
   }
diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index 795d7655..17bef541 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2013.01.05.220937"
+#define Xorriso_timestamP "2013.01.06.093550"