Milton,
To answer your poll, I upgraded one of mine. No problem at all.
Even did it from a wireless laptop, to the main router, to the wireless bridged router.
If you are looking for somethng special will be glad to downgrade and upgrade again to help you test something.
Also, you didn't post your poll answers.
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I upgraded mine and it worked fine until it had no audio and after a power cycle it failed to come back to life....now all it will do is reboot after about 1 to 2 min and can only be connected to via the local lan....after which it will tell me that it needs to be programmed and when I put all the info into the box it will still not allow internet connection....only local lan and it will repeat the same promt of needing to be programmed.
I also tried to reprogram the box but can't get passed the promt of needing to be programmed.