diff --git a/markdown.php b/markdown.php
index ee3dddb..f31f708 100644
--- a/markdown.php
+++ b/markdown.php
@@ -950,7 +950,7 @@ class Markdown_Parser {
 
 		# Re-usable patterns to match list item bullets and number markers:
 		$marker_ul_re  = '[*+-]';
-		$marker_ol_re  = '\d+[.]';
+		$marker_ol_re  = '\d+[\.]';
 		$marker_any_re = "(?:$marker_ul_re|$marker_ol_re)";
 
 		$markers_relist = array(
@@ -1011,7 +1011,7 @@ class Markdown_Parser {
 	function _doLists_callback($matches) {
 		# Re-usable patterns to match list item bullets and number markers:
 		$marker_ul_re  = '[*+-]';
-		$marker_ol_re  = '\d+[.]';
+		$marker_ol_re  = '\d+[\.]';
 		$marker_any_re = "(?:$marker_ul_re|$marker_ol_re)";
 		
 		$list = $matches[1];
@@ -1141,17 +1141,17 @@ class Markdown_Parser {
 
 
 	var $em_relist = array(
-		''  => '(?:(?<!\*)\*(?!\*)|(?<!_)_(?!_))(?=\S|$)(?![.,:;]\s)',
+		''  => '(?:(?<!\*)\*(?!\*)|(?<!_)_(?!_))(?=\S|$)(?![\.,:;]\s)',
 		'*' => '(?<=\S|^)(?<!\*)\*(?!\*)',
 		'_' => '(?<=\S|^)(?<!_)_(?!_)',
 		);
 	var $strong_relist = array(
-		''   => '(?:(?<!\*)\*\*(?!\*)|(?<!_)__(?!_))(?=\S|$)(?![.,:;]\s)',
+		''   => '(?:(?<!\*)\*\*(?!\*)|(?<!_)__(?!_))(?=\S|$)(?![\.,:;]\s)',
 		'**' => '(?<=\S|^)(?<!\*)\*\*(?!\*)',
 		'__' => '(?<=\S|^)(?<!_)__(?!_)',
 		);
 	var $em_strong_relist = array(
-		''    => '(?:(?<!\*)\*\*\*(?!\*)|(?<!_)___(?!_))(?=\S|$)(?![.,:;]\s)',
+		''    => '(?:(?<!\*)\*\*\*(?!\*)|(?<!_)___(?!_))(?=\S|$)(?![\.,:;]\s)',
 		'***' => '(?<=\S|^)(?<!\*)\*\*\*(?!\*)',
 		'___' => '(?<=\S|^)(?<!_)___(?!_)',
 		);