Troubleshooting:cannot open shared object file: No such file or directory
This advice applies to those people running an SVN version of myth, not the tarball or packaged versions.
If you see this:
/usr/local/bin/mythbackend: error while loading shared libraries: libmythupnp-0.19.so.0: cannot open shared object file: No such file or directory
after updating myth, then you probably need to do the following:
If that doesn't work try make distclean, then configure, then make and make install.
If that all fails, try a fresh checkout of the svn repository, after deleting or moving your current checkout:
svn co http://svn.mythtv.org/svn/trunk/mythtv svn co http://svn.mythtv.org/svn/trunk/mythplugins svn co http://svn.mythtv.org/svn/trunk/myththemes
Then go through the usual build process (configure && qmake mythtv.pro && make && make install).