Since beta1 Entity Translation requires core version at least 7.15.
Maintenance release. Primarily fixes the upgrade path from alpha2. See the beta1 release notes for a complete list of changes since alpha2.
#1846104: Entity Translation shouldn't assume $form['#entity_type'] is a string
#1845896: Validate translation authoring info on submit
#1835578: Entity translation metadata should be stored only if the entity bundle is translatable
#1437976: Invalid node translation menu callback set when entity translation for nodes is disabled
#1844844: Content type settings always showed
#1833496: Cannot initialize entity translation path variables (invalid path scheme).
#1397560: Delete translation button not working if destination parameter is set
#1829740: Node and comments ET settings are available also when translation is disabled
#1829980: Upgrade to Beta1 results in "Integrity constraint violation: 1048 Column 'module' cannot be null"