For some reason, Google doesn't seem interested in fixing this bug.. Odd. Anyway, here's what you have to do: Go into your GMail Settings, under the General tab. Type your responder subject and message (do not turn the autoresponder on) Save these settings. Return to the Vacation Responder settings, and turn it on. That's it, it should work! Hope this helps someone I found this out a few months ago but didn't think to tell anyone..