diff --git a/src/calibre/ebooks/lrf/pdf/convert_from.py b/src/calibre/ebooks/lrf/pdf/convert_from.py
index 0b11d47877..0fcbb8eb34 100644
--- a/src/calibre/ebooks/lrf/pdf/convert_from.py
+++ b/src/calibre/ebooks/lrf/pdf/convert_from.py
@@ -36,7 +36,7 @@ def generate_html(pathtopdf, logger):
         if ret != 0:
             err = p.stderr.read()
             raise ConversionError, err
-        if os.stat(index).st_size < 100:
+        if not os.path.exists(index) or os.stat(index).st_size < 100:
             raise ConversionError(os.path.basename(pathtopdf) + ' does not allow copying of text.')
     finally:
         os.chdir(cwd)
diff --git a/src/calibre/manual/faq.rst b/src/calibre/manual/faq.rst
index 0f7a6ca3b9..ea90a8a1bd 100644
--- a/src/calibre/manual/faq.rst
+++ b/src/calibre/manual/faq.rst
@@ -23,9 +23,10 @@ What are the best formats to convert to LRF?
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 In order of decreasing preference: LIT, MOBI, HTML, PRC, RTF, TXT, PDF 
 
-Why does the PDF conversion lose some images?
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-The PDF conversion tries to extract the text and images from the PDF file and convert them to and HTML based ebook. Some PDF files have images in a format that cannot be extracted (vector images).
+Why does the PDF conversion lose some images/tables?
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+The PDF conversion tries to extract the text and images from the PDF file and convert them to and HTML based ebook. Some PDF files have images in a format that cannot be extracted (vector images). All tables
+are also represented as vector diagrams, thus they cannot be extracted.
 
 There are no images in the LRF file after conversion from HTML, or, why is only one HTML file being converted and not the others it links to?
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~