Thanks for the heads up. I have the BN version & so far it has not asked me to update & flash still works. If it does I'll decline.
The current version that's available in the B&N store does not support Flash - at least for Amazon's videos. I tried it when I got my HD+, and it didn't work. The Puffin browser from B&N did though - for now. It was the only browser I could (from B&N of the Play Store) that did.
What TnTexas wrote.
If you update and are stuck without Flash on Dolphin, get the Puffin Browser from the Nook Store.