amarok 2.5.0 update error

[Neal Becker]

After today's update to amarok 2.5.0, start amarok gives:

Amarok could not find any collection plugins. It is possible that Amarok is 
installed under the wrong prefix, please fix your installation using:
$ cd /path/to/amarok/source-code/
$ su -c "make uninstall"
$ cmake -DCMAKE_INSTALL_PREFIX=`kde4-config --prefix` && su -c "make install"
$ kbuildsycoca4 --noincremental
$ amarok
More information can be found in the README file. For further assistance join us 
at #amarok on irc.freenode.net.