Samsung Galaxy S3.
I go to Settings > My device > Sound > Vibrations
Before the Jelly Bean update, I had a custom vibration which was a medium length vibration. Now, after the Jelly Bean update a little while ago, it's just two short vibrations.
I've changed my vibration after I noticed this to "Jingle Bell" and it's still the same vibration. Any ideas on how to fix this?