I don't grow palms, frankly that sounds like a drying out problem. Try using a humidity tray under the pot, that may help.

My Majesty palm did the same thing when it wasn't getting enough water (and was placed by a vent). They love water and hate being dry for long periods of time.

Does it have spider mites currently? Some of the pics look like there some spider mite damage.

Has it been in the same spot since July? What's the soil/drainage condition? Near a window?

Majesty palms are notorious for being terrible house plants. There are hundreds of stories of people who have had the same thing happen. Fine for a few months then suddenly they fail. They're not really cut out to be houseplants and I'd suggest you try another type of Palm. Parlor palms and Bamboo palms are far more indoorsy.

Thanks for the replies. It has to be the heat vent, which is less than 20 feet away on the ceiling. Or it's a new kind of bug, as it's not spider mites.

Last week there were just a few leaves (if that's what they're called) that looked dried out and shriveled. Now they're all over the plant.

With my other majesty palms, I was spraying them with water daily. I don't know if that made a difference, or if it was just superstition.

I may buy another one just for the challenge. ;) If so, I'm going to move it further from the vent, or tape off the side of the vent that's directing air towards the plant. I'll also go back to spraying with water daily, and periodically spraying with detergent as a preventative measure.

I've been watering it with rain water that I collect. It was a really healthy plant. There's four or more new shoots that haven't opened yet, although I can see by the tips that they're going to come in pre-dried.

Sorry, but spraying w/ water (daily or not) doesn't do much for the plant.

If your intent is to increase ambient humidity, then pls. look up pebble trays & try that instead. I use them often on my Tropical plants & Hoyas.

PS: I go by the 3 strikes rule, 3 strikes you're out. Personally, I don't see the point to keep trying something I keep failing at. If I can't figure it out in those 3 attempts, it's time for me to move on to the next thing.

To offer some consolation, one of the Elders of my Indoor Gardening Club used to remind us that if we hadn't killed any plants lately, we weren't growing anything challenging enough. ;>)

Not the easiest of palm species. They need to be kept moist...., constantly (not like other palms that appreciate a bit of drying out between waterings). They also resent the overheated, arid homes of many northern homes in the winter as they are prone to spider mite and mealy bugs. Frankly, coconuts are easier in the North! LOL!