The latest version does not load audio and speaker devices for making calls over Gmail/Gvoice/Hangouts.
When call is initiated, no dialing can be heard. If user clicks on "settings" icon, speak and audio device fields are empty. Selection drop-down does not work.
-sign into gmail
-click "red" call button at bottom left
-dial # and hit enter
-status--> calling (BUT no audio, speaker, mic ... devices are not loading)
Windows 7 Pro.
Went back to version 188.8.131.52 and it works.