Well, blow me down. The Garmin Communicator has been broken for quite some time now on Chrome on my Mac, forcing me to use Firefox to upload activities from my Garmin Edge 800 or Garmin Forerunner 910xt. Not exactly a big deal, admittedly, but a minor annoyance.
What was more annoying, mind you, was the response from Garmin when I raised the issue with them, pointing them at the instructions on how to fix their plugin. Their response was to re-install the 4.0.3 version and try again in Safari. Yep, to fix a problem with Chrome, use Safari. Nice.
Anyway, 4.0.4 has been released and it totally fixes the problem. Don’t let Firefox install it for you though – you need to download the dmg package, close all your browsers and install it outwith Firefox, otherwise Chrome won’t pick it up.