diff --git a/kivy/parser.py b/kivy/parser.py
index 49fa5a890..57bc894a0 100644
--- a/kivy/parser.py
+++ b/kivy/parser.py
@@ -2,7 +2,7 @@
 Parser utilities
 ================
 
-Used specially for CSS
+Helper functions used for CSS
 '''
 
 __all__ = ('parse_image', 'parse_color', 'parse_int', 'parse_float',
@@ -17,9 +17,9 @@ from kivy.core.svg import Svg
 
 
 def parse_filename(filename):
-    '''Parse a filename, and search inside resource if exist.
-    If we haven't found it, just return the name.
-    '''
+    '''Parse a filename and search for it using `resource_find()`.
+    If found, the resource path is returned, otherwise return the unmodified
+    filename (as specified by the caller).'''
     filename = parse_string(filename)
     result = resource_find(filename)
     if result is None:
@@ -28,11 +28,12 @@ def parse_filename(filename):
 
 
 def parse_image(filename):
-    '''Parse a filename to load an image ro svg'''
+    '''Parse a filename and load it in a Widget (Image or Svg).
+    Svg is used only if the file extension is '.svg', otherwise Image.'''
     filename = parse_filename(filename)
     if filename in (None, 'None', u'None'):
         return None
-    if filename.endswith('.svg'):
+    if filename.lower().endswith('.svg'):
         return Svg(filename)
     else:
         return Image(filename)
@@ -41,7 +42,7 @@ def parse_image(filename):
 
 
 def parse_color(text):
-    '''Parse a text color to a kivy color. Format supported are :
+    '''Parse a string to a kivy color. Supported formats :
         * rgb(r, g, b)
         * rgba(r, g, b, a)
         * #aaa
@@ -58,14 +59,15 @@ def parse_color(text):
         if len(res) == 3:
             res = ''.join(map(lambda x: x+x, res))
         value = [int(x, 16) / 255. for x in re.split(
-                 '([0-9a-f]{2})', res) if x != '']
+                 '(?i)([0-9a-f]{2})', res) if x != '']
         if len(value) == 3:
             value.append(1.)
     return value
 
 
 def parse_bool(text):
-    '''Parse a string to a boolean'''
+    '''Parse a string to a boolean, ignoring case. "true"/"1" is True, "false"/"0"
+       is False. Anything else throws an exception.'''
     if text.lower() in ('true', '1'):
         return True
     elif text.lower() in ('false', '0'):
@@ -74,14 +76,14 @@ def parse_bool(text):
 
 
 def parse_string(text):
-    '''Parse a string to a string (remove quotes and double-quotes)'''
+    '''Parse a string to a string (remove single and double quotes)'''
     if len(text) >= 2 and text[0] in ('"', "'") and text[-1] in ('"', "'"):
         text = text[1:-1]
     return text.strip()
 
 
 def parse_int2(text):
-    '''Parse a string to a integer with exactly 2 number
+    '''Parse a string to a list of exactly 2 integers
 
         >>> print parse_int2("12 54")
         12, 54
@@ -90,16 +92,16 @@ def parse_int2(text):
     texts = [x for x in text.split(' ') if x.strip() != '']
     value = map(parse_int, texts)
     if len(value) < 1:
-        raise Exception('Invalid format int2 for %s' % text)
+        raise Exception('Invalid int2 format: %s' % text)
     elif len(value) == 1:
         return [value[0], value[0]]
     elif len(value) > 2:
-        raise Exception('Too much value in %s : %s' % (text, str(value)))
+        raise Exception('Too many values in %s: %s' % (text, str(value)))
     return value
 
 
 def parse_float4(text):
-    '''Parse a string to a float with exactly 4 floats
+    '''Parse a string to a list of exactly 4 floats
 
         >>> parse_float4('54 87. 35 0')
         54, 87., 35, 0
@@ -108,7 +110,7 @@ def parse_float4(text):
     texts = [x for x in text.split(' ') if x.strip() != '']
     value = map(parse_float, texts)
     if len(value) < 1:
-        raise Exception('Invalid format float4 for %s' % text)
+        raise Exception('Invalid float4 format: %s' % text)
     elif len(value) == 1:
         return map(lambda x: value[0], range(4))
     elif len(value) == 2:
@@ -117,7 +119,7 @@ def parse_float4(text):
         # ambigous case!
         return [value[0], value[1], value[0], value[2]]
     elif len(value) > 4:
-        raise Exception('Too much value in %s' % text)
+        raise Exception('Too many values in %s' % text)
     return value
 
 parse_int = int