I've attached a patch that drops into debian/patches.
-- Richard
Index: jpeg-8d/jpegtran.1 =================================================================== --- jpeg-8d.orig/jpegtran.1 2009-12-28 13:38:22.000000000 -0600 +++ jpeg-8d/jpegtran.1 2013-06-24 16:31:39.675724530 -0500 @@ -28,7 +28,15 @@ followed by .B cjpeg to accomplish the same conversion. But by the same token, .B jpegtran -cannot perform lossy operations such as changing the image quality. +cannot perform lossy operations such as changing the image quality. However, +"lossless" in this context only applies to the image data. Extra markers can +be (and most are by default) dropped; see the +.B \-copy +argument for details. This is especially important on modern "JPEG" files, +which are actually EXIF files; the EXIF metadata will be lost. To avoid this, +use +.B exiftran +instead. .PP .B jpegtran reads the named JPEG/JFIF file, or the standard input if no file is
