diff --git a/scss.inc.php b/scss.inc.php
index 47db2d57..2c50706a 100644
--- a/scss.inc.php
+++ b/scss.inc.php
@@ -117,7 +117,7 @@ protected function makeOutputBlock($type, $selectors = null) {
 		return $out;
 	}
 
-	protected function matchExtendsSingle($single, &$out_origin, &$out_rem) {
+	protected function matchExtendsSingle($single, &$out_origin) {
 		$counts = array();
 		foreach ($single as $part) {
 			if (!is_string($part)) return false; // hmm
@@ -130,20 +130,30 @@ protected function matchExtendsSingle($single, &$out_origin, &$out_rem) {
 			}
 		}
 
+		$out_origin = array();
+		$found = false;
+
 		foreach ($counts as $idx => $count) {
 			list($target, $origin) = $this->extends[$idx];
+
 			// check count
 			if ($count != count($target)) continue;
+
 			// check if target is subset of single
 			if (array_diff(array_intersect($single, $target), $target)) continue;
 
-			$out_origin = $origin;
-			$out_rem = array_diff($single, $target);
+			$rem = array_diff($single, $target);
 
-			return true;
+			foreach ($origin as $j => $new) {
+				$origin[$j][count($origin[$j]) - 1] = $this->combineSelectorSingle(end($new), $rem);
+			}
+
+			$out_origin = array_merge($out_origin, $origin);
+
+			$found = true;
 		}
 
-		return false;
+		return $found;
 	}
 
 	protected function combineSelectorSingle($base, $other) {
@@ -152,7 +162,7 @@ protected function combineSelectorSingle($base, $other) {
 
 		foreach (array($base, $other) as $single) {
 			foreach ($single as $part) {
-				if (preg_match('/^[^.#:]/', $part)) {
+				if (preg_match('/^[^\[.#:]/', $part)) {
 					$tag = $part;
 				} else {
 					$out[] = $part;
@@ -171,15 +181,13 @@ protected function matchExtends($selector, &$out, $from = 0, $initial=true) {
 		foreach ($selector as $i => $part) {
 			if ($i < $from) continue;
 
-			if ($this->matchExtendsSingle($part, $origin, $rem)) {
+			if ($this->matchExtendsSingle($part, $origin)) {
 				$before = array_slice($selector, 0, $i);
 				$after = array_slice($selector, $i + 1);
 
 				foreach ($origin as $new) {
-					$new[count($new) - 1] =
-						$this->combineSelectorSingle(end($new), $rem);
-
 					$k = 0;
+
 					// remove shared parts
 					if ($initial) {
 						foreach ($before as $k => $val) {
@@ -317,7 +325,7 @@ protected function flattenSelectorSingle($single) {
 		foreach ($single as $part) {
 			if (empty($joined) ||
 				!is_string($part) ||
-				preg_match('/[.:#%]/', $part))
+				preg_match('/[\[.:#%]/', $part))
 			{
 				$joined[] = $part;
 				continue;
@@ -1535,7 +1543,7 @@ protected function coerceString($value) {
 
 	protected function assertList($value) {
 		if ($value[0] != "list")
-			throw new exception("expecting list");
+			throw new Exception("expecting list");
 		return $value;
 	}
 
@@ -3921,7 +3929,7 @@ public function serve() {
 			if ($this->needsCompile($input, $output)) {
 				try {
 					echo $this->compile($input, $output);
-				} catch (exception $e) {
+				} catch (Exception $e) {
 					header('HTTP/1.1 500 Internal Server Error');
 					echo "Parse error: " . $e->getMessage() . "\n";
 				}
diff --git a/tests/inputs/extends.scss b/tests/inputs/extends.scss
index cd6ad526..c6b1bde8 100644
--- a/tests/inputs/extends.scss
+++ b/tests/inputs/extends.scss
@@ -131,3 +131,43 @@ wassup {
         color: blue;
     }
 }
+
+// multi-extend
+
+#something {
+    color: red;
+}
+
+.x {
+    @extend #something;
+}
+
+.y {
+    @extend #something;
+}
+
+// multi-extend with nesting
+
+.btn:hover,
+.btn:active,
+.btn.active,
+.btn.disabled,
+.btn[disabled] {
+  color: red;
+}
+.edit .actions {
+  button {
+    float: right;
+    @extend .btn;
+  }
+}  
+.edit {
+  .new {
+   .actions {
+      padding: 0;
+   }
+   .actions button {
+      @extend .btn;
+   }
+ }
+}
diff --git a/tests/outputs/extends.css b/tests/outputs/extends.css
index 724cb5e8..23d04243 100644
--- a/tests/outputs/extends.css
+++ b/tests/outputs/extends.css
@@ -16,7 +16,7 @@ hello {
 .blue, .me {
   color: purple; }
 
-a:hover, .hoverlink {
+a:hover, .hoverlink, #demo .overview .fakelink:hover {
   text-decoration: underline; }
 
 div.hello.world.hmm, pre div.okay.span.world.hmm, pre #butt .umm div.sure.span.world.hmm, #butt .umm pre div.sure.span.world.hmm, code div.okay.span.world.hmm, code #butt .umm div.sure.span.world.hmm, #butt .umm code div.sure.span.world.hmm {
@@ -70,3 +70,15 @@ wassup {
 
 .foo .wassup {
   color: blue; }
+
+#something, .x, .y {
+  color: red; }
+
+.btn:hover, .edit .actions button:hover, .edit .new .actions button:hover, .btn:active, .edit .actions button:active, .edit .new .actions button:active, .btn.active, .edit .actions button.active, .edit .new .actions button.active, .btn.disabled, .edit .actions button.disabled, .edit .new .actions button.disabled, .btn[disabled], .edit .actions button[disabled], .edit .new .actions button[disabled] {
+  color: red; }
+
+.edit .actions button {
+  float: right; }
+
+.edit .new .actions {
+  padding: 0; }