diff --git a/debian/README.Debian b/debian/README.Debian
index 6703524..798e490 100644
--- a/debian/README.Debian
+++ b/debian/README.Debian
@@ -4,12 +4,41 @@ GPL Ghostscript for Debian
 Links against shared JPEG library
 ---------------------------------
 
-GPL Ghostscript is linked against the shared IJG JPEG library (not a
-statically linked local copy).  Some valid PostScript and PDF files will
-fail to parse due to some (old, presumably?) Adobe interpreters
-violating the JPEG standard.  More info at [bug#582521].
+On Debian systems, ghostscript is linked against the shared
+IJG JPEG library, instead of using the patched local copy
+bundled with the ghostscript source.  The two versions of
+the library behave identically except in two respects, both
+concerning invalid JPEG streams:
 
-[bug#582521]: <http://bugs.debian.org/582521>
+- The bundled libjpeg fakes a valid component id when JPEG
+  streams include an SOF or SOS marker whose component
+  identifiers are not all distinct (see the description of
+  C_i in B.2.2 of the JPEG spec).  The shared IJG JPEG
+  library produces artifacts (e.g., stripes) when presented
+  with such component ids.
+
+  http://bugs.ghostscript.com/show_bug.cgi?id=686980
+
+- The bundled libjpeg is configured to accept up to 64 blocks
+  per MCU, instead of the limit of 10 blocks per MCU described
+  in the Postscript reference manual and JPEG standard.
+  According to lore and Adobe's tech note 5116, in 1991 Adobe
+  came across some files in the wild exceeding the standard
+  for blocks per MCU, and Adobe's implementation would
+  sometimes accept such streams.
+
+  That said, the PRLM3 states quite straightforwardly that the number
+  of blocks in the MCU must not exceed 10. The PRLM2 contains the same
+  condition, but attributes it to "the JPEG-proposed standard". Thus,	
+  we believe that any PostScript file containing this kind of JPEG
+  stream can safely be considered invalid.
+
+If you come across a file triggering either of these
+conditions, please let us know by reporting a bug against
+the ghostscript package.
+
+See Bug #582522 and Bug #582521 for more detail,
+particularly http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=582522#46
 
 DroidSansFallback is default fallback for CJK documents
 -------------------------------------------------------
@@ -23,4 +52,4 @@ rendered as bullets.
 See Use.htm#CIDFontSubstitution from the ghostscript-doc package for
 details.
 
- -- Jonas Smedegaard <dr@jones.dk>  Thu, 01 Mar 2012 21:08:13 +0100
+ -- bastien <bastien@bastien-debian.roucaries.org>, Mon, 23 Jul 2012 22:54:45 +0200