Although I really thought I'd return the G12, as I was on my way to Best Buy with re-packaged G12 and receipt in hand, I realized that I was hoping my copy would be defective. If the store demo worked with the wireless trigger in my pocket then my G12 could be exchanged. The firmware version could be checked afterward to satisfy my curiosity. To my dismay, the store demo G12 suffered the same firmware bug (I claim) as my own copy. Showing my great faith in Canon, I decided to keep the G12 anyway -- I'm having a good time with it.
Within the past two days, there have been reports or confirmations on Internet discussion forums regarding this issue with the G12. I think (hope!) that this is a firmware bug and that Canon will quickly make it right. In the meantime, I'll continue to work and play with my G12 and write about it in this blog. I'm currently replacing the G9 and its accessories with the G12 and have some G12 accessories on the way.
Now, come on Canon -- fix my G12!