I just read that the Amby Hammock beds are being recalled in the US after 2 baby deaths
I think they are sending out a repair kit in 2010, not sure if UK customers can get one though. I used an Amby bed from 8 weeks to 12.5 months as my son was a terrible sleeper and has reflux. Had no issues with it but had him right by my bed and used a breathing alarm.
If you are using one there is advice on Amby's american site about making sure your hammock doesn't tilt.