diff --git a/lib/helpers.js b/lib/helpers.js
index 087ca64..e771f9e 100644
--- a/lib/helpers.js
+++ b/lib/helpers.js
@@ -38,13 +38,15 @@ function skipChars(state, pos, code) {
   return pos;
 }
 
-// Skip char codes reverse from given position
-/*function skipCharsBack(state, pos, code, min) {
-  for (; pos >= min; pos--) {
-    if (code !== state.src.charCodeAt(pos)) { break; }
+// Skip char codes reverse from given position - 1
+function skipCharsBack(state, pos, code, min) {
+  if (pos <= min) { return pos; }
+
+  while (pos > min) {
+    if (code !== state.src.charCodeAt(--pos)) { return pos + 1; }
   }
   return pos;
-}*/
+}
 
 // cut lines range from source.
 function getLines(state, begin, end, keepLastLF) {
@@ -65,3 +67,4 @@ exports.skipEmptyLines = skipEmptyLines;
 exports.skipSpaces = skipSpaces;
 exports.skipChars = skipChars;
 exports.getLines = getLines;
+exports.skipCharsBack = skipCharsBack;
diff --git a/lib/lexer_block/lheading.js b/lib/lexer_block/lheading.js
index eccf81e..80f5b68 100644
--- a/lib/lexer_block/lheading.js
+++ b/lib/lexer_block/lheading.js
@@ -8,34 +8,34 @@ var skipChars       = require('../helpers').skipChars;
 
 
 module.exports = function lheading(state, startLine, endLine, silent) {
-  var marker, pos, mem, max,
+  var marker, pos, max,
       next = startLine + 1;
 
   if (next >= state.lineMax) { return false; }
 
   // Scan next line
+  if (state.tShift[next] > 3) { return false; }
+
   pos = state.bMarks[next] + state.tShift[next];
   max = state.eMarks[next];
 
-  if (pos + 3 > max) { return false; }
-
   marker = state.src.charCodeAt(pos);
 
   if (marker !== 0x2D/* - */ && marker !== 0x3D/* = */) { return false; }
 
-  mem = pos;
   pos = skipChars(state, pos, marker);
 
-  if (pos - mem < 3) { return false; }
-
   pos = skipSpaces(state, pos);
 
   if (pos < max) { return false; }
 
   if (silent) { return true; }
 
+  pos = state.bMarks[startLine] + state.tShift[startLine];
+  max = skipChars(state, state.eMarks[startLine], 0x20/* space */, pos);
+
   state.tokens.push({ type: 'heading_open', level: marker === 0x3D/* = */ ? 1 : 2 });
-  state.lexerInline.tokenize(state, state.bMarks[startLine], state.eMarks[startLine]);
+  state.lexerInline.tokenize(state, pos, max);
   state.tokens.push({ type: 'heading_close', level: marker === 0x3D/* = */ ? 1 : 2 });
 
   state.line = next + 1;
diff --git a/lib/lexer_block/paragraph.js b/lib/lexer_block/paragraph.js
index 9a9c486..79d717c 100644
--- a/lib/lexer_block/paragraph.js
+++ b/lib/lexer_block/paragraph.js
@@ -17,7 +17,8 @@ module.exports = function paragraph(state, startLine, endLine) {
     if (rules_named.hr(state, nextLine, endLine, true)) { break; }
     if (rules_named.list(state, nextLine, endLine, true)) { break; }
     if (rules_named.heading(state, nextLine, endLine, true)) { break; }
-    if (rules_named.lheading(state, nextLine, endLine, true)) { break; }
+    // setex header can't interrupt paragraph
+    // if (rules_named.lheading(state, nextLine, endLine, true)) { break; }
     if (rules_named.blockquote(state, nextLine, endLine, true)) { break; }
     if (rules_named.table(state, nextLine, endLine, true)) { break; }
     //if (rules_named.tag(state, nextLine, endLine, true)) { break; }
diff --git a/lib/renderer.js b/lib/renderer.js
index 4fcce4f..8ac9dea 100644
--- a/lib/renderer.js
+++ b/lib/renderer.js
@@ -22,7 +22,7 @@ var rules = {};
 
 
 rules.blockquote_open = function (state /*, token*/) {
-  state.result += '<blockquote>';
+  state.result += '<blockquote>\n';
 };
 rules.blockquote_close = function (state /*, token*/) {
   state.result += '</blockquote>\n';
@@ -55,7 +55,7 @@ rules.heading_close = function (state, token) {
 
 
 rules.hr = function (state/*, token*/) {
-  state.result += '<hr>\n';
+  state.result += state.options.xhtml ? '<hr />\n' : '<hr>\n';
 };