Error can't find "rcube" for globaladdressbook plugin rcube::get_instance();

[thesealportalteam]

I'm getting the following error in roundcube 0.7.2:

Class 'rcube' not found in ~/plugins/globaladdressbook/globaladdressbook.php on line 24

[JohnDoh]

hi. you have downloaded the wrong version of the plugin. please use the version tagged for 0.7.2. the master branch version requires the latest rc svn trunk version of the core.

[thesealportalteam]

I changed the plugin rcube to rcmail and the plug-in works fine.