Whatever the reason, my guess would be that it was

Whatever the reason, my guess would be that it was significant enough to warrant this action. The simplest reason I could think of was that one or more of the key speakers wasn't available, but I doubt this because of the weight implied upon today's CC based on all the FUD that led to the pummeling of the stock price.

More likely that one of the key things they wanted to speak about had some late breaking update that the Company wanted to digest. Curiously though, if it were a simple update, I would have expected the Company to provide a new date for the CC with today's PR of the cancellation -- so again, a significant event occurred very recently.

I don't want to guess at what it might be for fear of being disappointed. I just want the band aid ripped off and see that my wound has healed.