diff --git a/CHANGELOG b/CHANGELOG
index fa2cd55..58d511a 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,6 +1,8 @@
 *SVN*
 
-* Optimize Element#up/down/next/previous. [Dylan Bruzenak, Nick Stackenburg, Andrew Dupont]
+* Fix the way Selector handles [pseudoclass + combinator] with no space in between. Closes #9696. [kangax, fearphage, Andrew Dupont]
+
+* Optimize Element#up/down/next/previous. Closes #10353. [Dylan Bruzenak, Nick Stackenburg, Andrew Dupont]
 
 * Handle case-sensitivity in Selector tag names better. Closes #5052. [mexx, Andrew Dupont]
 
diff --git a/src/selector.js b/src/selector.js
index b5814d6..d487b57 100644
--- a/src/selector.js
+++ b/src/selector.js
@@ -271,7 +271,8 @@ Object.extend(Selector, {
     tagName:      /^\s*(\*|[\w\-]+)(\b|$)?/,
     id:           /^#([\w\-\*]+)(\b|$)/,
     className:    /^\.([\w\-\*]+)(\b|$)/,
-    pseudo:       /^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s)|(?=:))/,
+    pseudo:      
+/^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/,
     attrPresence: /^\[([\w]+)\]/,
     attr:         /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/
   },
diff --git a/test/unit/selector.html b/test/unit/selector.html
index 6c01bbe..36af5e4 100644
--- a/test/unit/selector.html
+++ b/test/unit/selector.html
@@ -100,7 +100,7 @@
 
   // Added by TDD - 2007.02.20
   $RunBenchmarks = false;
-
+  
   new Test.Unit.Runner({
     
     testSelectorWithTagName: function() {with(this) {
@@ -372,6 +372,8 @@
       assertEnumEqual([$('em')], $$('#p a:not(a[rel$="nofollow"]) > em'), 'attribute 4')
       assertEnumEqual([$('item_2')], $$('#list li:not(#item_1):not(#item_3)'), 'adjacent :not clauses');
       assertEnumEqual([$('son')], $$('#grandfather > div:not(#uncle) #son'));
+      assertEnumEqual([$('em')], $$('#p a:not(a[rel$="nofollow"]) em'), 'attribute 4 + all descendants');
+      assertEnumEqual([$('em')], $$('#p a:not(a[rel$="nofollow"])>em'), 'attribute 4 (without whitespace)');
     }},
     
     testSelectorWithEnabledDisabledChecked: function() {with(this) {
@@ -398,6 +400,8 @@
       assertEnumEqual($$('ul > li:last-child'), $$('ul > li:nth-last-child(1)'));
       assertEnumEqual($$('#troubleForm *:enabled'), $$('#troubleForm *:not(:disabled)'));
       assertEnumEqual($$('ul > li:nth-child(n-999)'), $$('ul > li'));
+      assertEnumEqual($$('ul>li'), $$('ul > li'));
+      assertEnumEqual($$('#p a:not(a[rel$="nofollow"])>em'), $$('#p a:not(a[rel$="nofollow"]) > em'))
     }},
     
     testSelectorsThatShouldReturnNothing: function() {with(this) {