diff --git a/io_scene_fbx/export_fbx.py b/io_scene_fbx/export_fbx.py
index ee0ebdd41c853f6635e89ccf22a75d596fc9bf66..056da9410922f88999bd4b21f9607c5cf21ff9e2 100644
--- a/io_scene_fbx/export_fbx.py
+++ b/io_scene_fbx/export_fbx.py
@@ -2207,7 +2207,7 @@ Objects:  {''')
                 if me in iter(my_bone.blenMeshes.values()):
                     write_sub_deformer_skin(my_mesh, my_bone, weights)
 
-    # Write pose's really weired, only needed when an armature and mesh are used together
+    # Write pose's really weird, only needed when an armature and mesh are used together
     # each by themselves dont need pose data. for now only pose meshes and bones
 
     file.write('''
diff --git a/space_view3d_math_vis/__init__.py b/space_view3d_math_vis/__init__.py
index ecc8d6d6bcdd86cbe00a8b8a20af6f61c6e5156c..b1b9b3bdd7aeb6e7169dff4d14bd4748ab4060cb 100644
--- a/space_view3d_math_vis/__init__.py
+++ b/space_view3d_math_vis/__init__.py
@@ -1,4 +1,4 @@
-#====================== BEGIN GPL LICENSE BLOCK ======================
+# ##### BEGIN GPL LICENSE BLOCK #####
 #
 #  This program is free software; you can redistribute it and/or
 #  modify it under the terms of the GNU General Public License
@@ -14,7 +14,9 @@
 #  along with this program; if not, write to the Free Software Foundation,
 #  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 #
-#======================= END GPL LICENSE BLOCK ========================
+# ##### END GPL LICENSE BLOCK #####
+
+# <pep8 compliant>
 
 bl_info = {
     "name": "Math Vis (Console)",
@@ -50,7 +52,7 @@ class VIEW3D_PT_math_vis(bpy.types.Panel):
         layout = self.layout
         view = context.space_data
 
-        col = layout.column(align=True) 
+        col = layout.column(align=True)
 
         callbacks = draw.callbacks
         ok = False
@@ -62,7 +64,6 @@ class VIEW3D_PT_math_vis(bpy.types.Panel):
         col.operator("view3d.math_vis_toggle", emboss=False, icon='CHECKBOX_HLT' if ok else 'CHECKBOX_DEHLT')
 
 
-
 class SetupMathView(bpy.types.Operator):
     '''Draw a line with the mouse'''
     bl_idname = "view3d.math_vis_toggle"
@@ -97,6 +98,7 @@ def register():
     import console_python
     console_python.execute.hooks.append((console_hook, ()))
 
+
 def unregister():
     bpy.utils.unregister_module(__name__)
 
diff --git a/system_demo_mode/__init__.py b/system_demo_mode/__init__.py
index 3ee4e70ba54d48eb5ce9a28914d925dc6756dcdd..cc568c11ae3d28cac70829b02f8a66c713c33d4d 100644
--- a/system_demo_mode/__init__.py
+++ b/system_demo_mode/__init__.py
@@ -24,7 +24,7 @@ bl_info = {
     "blender": (2, 5, 7),
     "api": 35622,
     "location": "Demo Menu",
-    "description": "TODO",
+    "description": "Demo mode lets you select multiple blend files and loop over them.",
     "warning": "",
     "wiki_url": "http://wiki.blender.org/index.php/Extensions:2.5/Py/"\
         "Scripts/System/Demo_Mode#Running_Demo_Mode",