ES 1.7.3, Marvel 1.3.
Worked fine for me.
# /usr/share/elasticsearch/bin/plugin install elasticsearch/marvel/latest
-> Installing elasticsearch/marvel/latest...
Trying http://download.elasticsearch.org/elasticsearch/marvel/marvel-latest.zip...
Downloading ..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................DONE
Installed elasticsearch/marvel/latest into /usr/share/elasticsearch/plugins/marvel