diff --git a/src/mapcss/Rule.py b/src/mapcss/Rule.py
index bc7b30e..3d44985 100644
--- a/src/mapcss/Rule.py
+++ b/src/mapcss/Rule.py
@@ -31,11 +31,14 @@ class Rule():
         return "%s|z%s-%s %s"%(self.subject, self.minZoom, self.maxZoom, self.conditions)
 
     def test(self, obj, tags, zoom):
-        if not ((zoom >= self.minZoom) and (zoom <= self.maxZoom)):
+        if (zoom < self.minZoom) or (zoom > self.maxZoom):
             return False
+
         if (self.subject != '') and not _test_feature_compatibility(obj, self.subject, tags):
             return False
+
         subpart = "::default"
+
         for condition in self.conditions:
             res = condition.test(tags)
             if not res:
diff --git a/src/mapcss/StyleChooser.py b/src/mapcss/StyleChooser.py
index 188a4b6..bab9d3b 100644
--- a/src/mapcss/StyleChooser.py
+++ b/src/mapcss/StyleChooser.py
@@ -101,10 +101,14 @@ class StyleChooser:
         if self.selzooms:
             if zoom < self.selzooms[0] or zoom > self.selzooms[1]:
                 return sl
+
         object_id = self.testChain(self.ruleChains,ftype,tags,zoom)
+
         if not object_id:
             return sl
+
         w = 0
+
         for r in self.styles:
             ra = {}
             for a,b in r.iteritems():
@@ -120,6 +124,7 @@ class StyleChooser:
                 ra[a] = b
             r = ra
             ra = {}
+
             for a, b in r.iteritems():
                 "checking and nicifying style table"
                 if "color" in a:
@@ -146,7 +151,6 @@ class StyleChooser:
                         ra[a] = []
                 else:
                     ra[a]=b
-            ra["layer"] = float(tags.get("layer",0))*2000+ra.get("z-index",1) # calculating z-index
             #for k,v in ra.items():  # if a value is empty, we don't need it - renderer will do as default.
             #    if not v:
             #        del ra[k]
@@ -240,5 +244,4 @@ class StyleChooser:
                     b = Eval(b)
                 ra[a] = b
             rb.append(ra)
-         # print rb
         self.styles = self.styles + rb
diff --git a/src/mapcss/webcolors/webcolors.py b/src/mapcss/webcolors/webcolors.py
index d210616..4b2643d 100644
--- a/src/mapcss/webcolors/webcolors.py
+++ b/src/mapcss/webcolors/webcolors.py
@@ -200,7 +200,7 @@ def _reversedict(d):
     """
     return dict(zip(d.values(), d.keys()))
 
-HEX_COLOR_RE = re.compile(r'^#([a-fA-F0-9]{3}|[a-fA-F0-9]{6})$')
+HEX_COLOR_RE = re.compile(r'^#([a-fA-F0-9]|[a-fA-F0-9]{3}|[a-fA-F0-9]{6})$')
 
 SUPPORTED_SPECIFICATIONS = ('html4', 'css2', 'css21', 'css3')
 
@@ -455,6 +455,8 @@ def normalize_hex(hex_value):
         raise ValueError("'%s' is not a valid hexadecimal color value." % hex_value)
     if len(hex_digits) == 3:
         hex_digits = ''.join(map(lambda s: 2 * s, hex_digits))
+    elif len(hex_digits) == 1:
+        hex_digits = hex_digits * 6
     return '#%s' % hex_digits.lower()
 
 
@@ -831,8 +833,6 @@ def rgb_percent_to_rgb(rgb_percent_triplet):
     """
     return tuple(map(_percent_to_integer, rgb_percent_triplet))
 
-
-
 def whatever_to_rgb(string):
     """
     Converts CSS3 color or a hex into rgb triplet; hash of string if fails.
@@ -854,14 +854,13 @@ def whatever_to_hex(string):
     if type(string) == tuple:
         return cairo_to_hex(string).upper()
     return rgb_to_hex(whatever_to_rgb(string)).upper()
+
 def whatever_to_cairo(string):
     a = whatever_to_rgb(string)
-    return a[0]/255.,a[1]/255.,a[2]/255.,
+    return a[0]/255.,a[1]/255.,a[2]/255.
+
 def cairo_to_hex (cairo):
-    return rgb_to_hex((cairo[0]*255,cairo[1]*255,cairo[2]*255,))
-
-
-
+    return rgb_to_hex((cairo[0]*255.,cairo[1]*255.,cairo[2]*255.))
 
 if __name__ == '__main__':
     import doctest