Error for files with Layers

[bargool]

I'm having error when using pdf with Layers:
Traceback:
File "G:\python-education\pdfinfo.py", line 16, in
print name, inFile.getNumPages()
File "build\bdist.win-amd64\egg\pyPdf\pdf.py", line 431, in getNumPages
File "build\bdist.win-amd64\egg\pyPdf\pdf.py", line 607, in _flatten
File "build\bdist.win-amd64\egg\pyPdf\generic.py", line 165, in getObject
File "build\bdist.win-amd64\egg\pyPdf\pdf.py", line 649, in getObject
File "build\bdist.win-amd64\egg\pyPdf\generic.py", line 67, in readObject
File "build\bdist.win-amd64\egg\pyPdf\generic.py", line 531, in readFromStream

File "build\bdist.win-amd64\egg\pyPdf\generic.py", line 58, in readObject
File "build\bdist.win-amd64\egg\pyPdf\generic.py", line 153, in readFromStream

File "build\bdist.win-amd64\egg\pyPdf\generic.py", line 67, in readObject
File "build\bdist.win-amd64\egg\pyPdf\generic.py", line 531, in readFromStream

File "build\bdist.win-amd64\egg\pyPdf\generic.py", line 67, in readObject
File "build\bdist.win-amd64\egg\pyPdf\generic.py", line 531, in readFromStream

File "build\bdist.win-amd64\egg\pyPdf\generic.py", line 58, in readObject
File "build\bdist.win-amd64\egg\pyPdf\generic.py", line 153, in readFromStream

File "build\bdist.win-amd64\egg\pyPdf\generic.py", line 67, in readObject
File "build\bdist.win-amd64\egg\pyPdf\generic.py", line 531, in readFromStream

File "build\bdist.win-amd64\egg\pyPdf\generic.py", line 52, in readObject
File "build\bdist.win-amd64\egg\pyPdf\generic.py", line 339, in readStringFrom
Stream pyPdf.utils.PdfReadError: Unexpected escaped string

If I merge Layers in that pdf - all works good