Returned from holiday to find an email from Nikon. There's a new firmware update for the D3300. Just in case there's anyone not subscribed to the Nikon support emails the details & download link are here.

I have yet to try this but assume that it won't turn the camera into a paperweight.

Apparently the only change from the previous version = "Fixed an issue that sometimes resulted in incorrect exposure for the first photo taken in live view."

I think I've had this once or twice and assumed operator error. Nice to know it wasn't.

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