MacSpeech today released a minor upgrade to the iListen speech recognition product. The rev addresses some bugs in the Mac OS X Services menu and adds support for Hierarchical Menus in its built-in Script Editor. Users of upcoming ScriptPaks from MacSpeech will need this new version in order to use all of the commands in those ScriptPaks. The iListen 1.6.4 update is free to users of iListen 1.5 or greater and can be downloaded from the MacSpeech Update Center.