I've looked a bit more into this: if we ignore the basic X libraries (libXext, libXt, libSM, libICE, libXrandr, libXrender), the remaining missing depends boil down to:
Code:
./lib/ImageMagick-6.6.7/modules-Q16/coders/svg.so
librsvg-2.so.2 => not found
libgsf-1.so.114 => not found
libcroco-0.6.so.3 => not found
libpangocairo-1.0.so.0 => not found
libpangoft2-1.0.so.0 => not found
libpango-1.0.so.0 => not found
libgdk_pixbuf-2.0.so.0 => not found
libcairo.so.2 => not found
libpixman-1.so.0 => not found
./lib/ImageMagick-6.6.7/modules-Q16/coders/wmf.so
libwmf-0.2.so.7 => not found
./lib/python2.7/site-packages/_dbus_glib_bindings.so
libdbus-glib-1.so.2 => not found
./lib/python2.7/site-packages/PyQt4/QtDesigner.so
libQtDesigner.so.4 => not found
./lib/python2.7/site-packages/PyQt4/QtScript.so
libQtScript.so.4 => not found
./lib/python2.7/site-packages/PyQt4/QtScriptTools.so
libQtScriptTools.so.4 => not found
./lib/python2.7/site-packages/PyQt4/QtTest.so
libQtTest.so.4 => not found
./lib/python2.7/site-packages/PyQt4/QtXmlPatterns.so
libQtXmlPatterns.so.4 => not found
./lib/qt_plugins/graphicssystems/libqglgraphicssystem.so
libQtOpenGL.so.4 => not found
So none of the missing depends are in calibre itself, but they all come from libraries bundled in the binary release package. Still, the result is that the current binary release doesn't work on systems missing these libraries.
Davide