3 files changed, 75 insertions, 9 deletions

diff --git a/markdown/preprocessors.py b/markdown/preprocessors.py
index e7743fb..e968580 100644
--- a/markdown/preprocessors.py
+++ b/markdown/preprocessors.py
@@ -127,7 +127,7 @@ class HtmlBlockPreprocessor(Preprocessor):
     def run(self, lines):
         text = "\n".join(lines)
         new_blocks = []
-        text = text.split("\n\n")
+        text = text.rsplit("\n\n")
         items = []
         left_tag = ''
         right_tag = ''
diff --git a/tests/misc/blank_lines_in_codeblocks.html b/tests/misc/blank_lines_in_codeblocks.html
index 77da8e4..57a4c36 100644
--- a/tests/misc/blank_lines_in_codeblocks.html
+++ b/tests/misc/blank_lines_in_codeblocks.html
@@ -1,4 +1,34 @@
-<p>Preserve blank lines in code blocks</p>
+<p>Preserve blank lines in code blocks with tabs:</p>
+<pre><code>a code block
+
+two tabbed lines
+
+
+three tabbed lines
+
+
+
+four tabbed lines
+
+
+
+
+five tabbed lines
+
+
+
+
+
+six tabbed lines
+
+
+
+
+
+
+End of tabbed block
+</code></pre>
+<p>And without tabs:</p>
 <pre><code>a code block
 
 two blank lines
diff --git a/tests/misc/blank_lines_in_codeblocks.txt b/tests/misc/blank_lines_in_codeblocks.txt
index f2e582a..e7ae102 100644
--- a/tests/misc/blank_lines_in_codeblocks.txt
+++ b/tests/misc/blank_lines_in_codeblocks.txt
@@ -1,37 +1,73 @@
-Preserve blank lines in code blocks
+Preserve blank lines in code blocks with tabs:
 
     a code block
     
-    two blank lines
+    two tabbed lines
     
     
-    three blank lines
+    three tabbed lines
     
     
     
-    four blank lines
+    four tabbed lines
     
     
     
     
-    five blank lines
+    five tabbed lines
     
     
     
     
     
-    six blank lines
+    six tabbed lines
     
     
     
     
     
     
-    End of block
+    End of tabbed block
     
     
     
     
     
     
+And without tabs:
+
+    a code block
+
+    two blank lines
+
+
+    three blank lines
+
+
+
+    four blank lines
+
+
+
+
+    five blank lines
+
+
+
+
+
+    six blank lines
+
+
+
+
+
+
+    End of block
+
+
+
+
+
+
 End of document
\ No newline at end of file