Hmm... that's kind of weird. Is it one of the thin-leaved Hoyas? If it's not, it's just strange it would go bad overnight like that. Can you post a photo?

Denise in Omaha

It was the polyneura. It had many "broken" leaves and was looking really sad. Today I pulled out all the limp and broken leaves/stems. I ended up with half the size it was and potted it down. I've had it under CFL - soft white 2400k and a bright white 6500k. It seems to have perked up quite a bit. I'm happier now even though I have a much smaller plant.'

You can see a bit of the broken stems.

Oh, then it was probably just the broken vines that were dying off. That looks nice and healthy! I wish the box stores would carry polyneura again around here!

Denise in Omaha

Denise, if you would ever like a cutting or small rooting plant, I would be more than happy to send it to you.