diff --git a/panels/console.py b/panels/console.py
index 36c733af..3f0ad5fa 100644
--- a/panels/console.py
+++ b/panels/console.py
@@ -54,9 +54,9 @@ class ConsolePanel(ScreenPanel):
         options.set_hexpand(True)
         options.set_vexpand(False)
         options.add(o1_lbl)
-        options.pack_start(o1_switch, False, 0, 5)
+        options.pack_start(o1_switch, False, False, 5)
         options.add(o2_lbl)
-        options.pack_start(o2_switch, False, 0, 5)
+        options.pack_start(o2_switch, False, False, 5)
         options.add(o3_button)
 
         sw = Gtk.ScrolledWindow()
diff --git a/panels/extrude.py b/panels/extrude.py
index c9a48f44..027986c5 100644
--- a/panels/extrude.py
+++ b/panels/extrude.py
@@ -47,7 +47,8 @@ class ExtrudePanel(ScreenPanel):
         extgrid = self._gtk.HomogeneousGrid()
         self.current_extruder = self._printer.get_stat("toolhead", "extruder")
         limit = 5
-        for i, extruder in enumerate(self._printer.get_tools()):
+        i = 0
+        for extruder in self._printer.get_tools():
             if self._printer.extrudercount > 1:
                 self.labels[extruder] = self._gtk.ButtonImage("extruder-%s" % i, "")
             else:
@@ -57,9 +58,9 @@ class ExtrudePanel(ScreenPanel):
                 self.labels[extruder].get_style_context().add_class("button_active")
             if i < limit:
                 extgrid.attach(self.labels[extruder], i, 0, 1, 1)
+                i += 1
         if i < (limit - 1):
             extgrid.attach(self.labels['temperature'], i + 1, 0, 1, 1)
-        i += 1
 
         distgrid = Gtk.Grid()
         j = 0
diff --git a/panels/fine_tune.py b/panels/fine_tune.py
index a0af2e52..0cfc84d2 100644
--- a/panels/fine_tune.py
+++ b/panels/fine_tune.py
@@ -175,6 +175,8 @@ class FineTunePanel(ScreenPanel):
             gcode = "SET_GCODE_OFFSET Z_ADJUST=-%s MOVE=1" % self.bs_delta
         elif dir == "reset":
             gcode = "SET_GCODE_OFFSET Z=0 MOVE=1"
+        else:
+            gcode = ""
 
         self._screen._ws.klippy.gcode_script(gcode)
 
diff --git a/panels/job_status.py b/panels/job_status.py
index e6c37bfa..03a6e222 100644
--- a/panels/job_status.py
+++ b/panels/job_status.py
@@ -884,12 +884,12 @@ class JobStatusPanel(ScreenPanel):
                     i['data'] = ""
             self.show_file_thumbnail()
             if "object_height" in self.file_metadata:
-                self.height = self.file_metadata['object_height']
+                self.height = float(self.file_metadata['object_height'])
                 self.labels['height'].set_label(str(self.height) + " mm")
                 if "layer_height" in self.file_metadata:
-                    self.layer_h = self.file_metadata['layer_height']
+                    self.layer_h = float(self.file_metadata['layer_height'])
                     if "first_layer_height" in self.file_metadata:
-                        self.f_layer_h = self.file_metadata['first_layer_height']
+                        self.f_layer_h = float(self.file_metadata['first_layer_height'])
                     else:
                         self.f_layer_h = self.layer_h
                     self.labels['total_layers'].set_label(str(int((self.height - self.f_layer_h) / self.layer_h) + 1))
diff --git a/panels/temperature.py b/panels/temperature.py
index fc643c6a..81c6e867 100644
--- a/panels/temperature.py
+++ b/panels/temperature.py
@@ -227,6 +227,7 @@ class TemperaturePanel(ScreenPanel):
                     logging.info("Setting %s to %d" % (heater, 0))
                     self._printer.set_dev_stat(heater, "target", 0)
             else:
+                target = None
                 for heater in self.active_heaters:
                     MAX_TEMP = int(float(self._printer.get_config_section(heater)['max_temp']))
                     if heater.startswith('extruder'):