diff --git a/PyPDF2/merger.py b/PyPDF2/merger.py
index 27702ad..c3373e4 100644
--- a/PyPDF2/merger.py
+++ b/PyPDF2/merger.py
@@ -113,7 +113,7 @@ class PdfFileMerger(object):
         if isString(fileobj):
             fileobj = file(fileobj, 'rb')
             my_file = True
-        elif isinstance(fileobj, file):
+        elif hasattr(fileobj, "seek") and hasattr(fileobj, "read"):
             fileobj.seek(0)
             filecontent = fileobj.read()
             fileobj = StreamIO(filecontent)
diff --git a/PyPDF2/pdf.py b/PyPDF2/pdf.py
index d1751a7..9fff2a8 100644
--- a/PyPDF2/pdf.py
+++ b/PyPDF2/pdf.py
@@ -2057,7 +2057,7 @@ class PdfFileReader(object):
         if encrypt['/Filter'] != '/Standard':
             raise NotImplementedError("only Standard PDF encryption handler is available")
         if not (encrypt['/V'] in (1, 2)):
-            raise NotImplementedError("only algorithm code 1 and 2 are supported")
+            raise NotImplementedError("only algorithm code 1 and 2 are supported. This PDF uses code %s" % encrypt['/V'])
         user_password, key = self._authenticateUserPassword(password)
         if user_password:
             self._decryption_key = key
@@ -2226,7 +2226,8 @@ class PageObject(DictionaryObject):
         return self
 
     def _rotate(self, angle):
-        currentAngle = self.get("/Rotate", 0)
+        rotateObj = self.get("/Rotate", 0)
+        currentAngle = rotateObj if isinstance(rotateObj, int) else rotateObj.getObject()
         self[NameObject("/Rotate")] = NumberObject(currentAngle + angle)
 
     def _mergeResources(res1, res2, resource):
@@ -2665,6 +2666,7 @@ class PageObject(DictionaryObject):
                 _text = operands[0]
                 if isinstance(_text, TextStringObject):
                     text += _text
+                    text += "\n"
             elif operator == b_("T*"):
                 text += "\n"
             elif operator == b_("'"):
diff --git a/README.md b/README.md
index 7301307..233201b 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-#PyPDF2
+# PyPDF2
 
 PyPDF2 is a pure-python PDF library capable of
 splitting, merging together, cropping, and transforming
@@ -10,22 +10,22 @@ as merge entire files together.
 Homepage  
 http://mstamy2.github.io/PyPDF2/
 
-##Examples
+## Examples
 
-Please see `sample code` folder
+Please see the `Sample_Code` folder.
 
-##Documentation
+## Documentation
 
 Documentation is available at  
 https://pythonhosted.org/PyPDF2/
 
 
-##FAQ
+## FAQ
 Please see  
 http://mstamy2.github.io/PyPDF2/FAQ.html
 
 
-##Tests
+## Tests
 PyPDF2 includes a test suite built on the unittest framework. All tests are located in the "Tests" folder.
 Tests can be run from the command line by: