Problem with editing a list

One of my lists keeps bombing when i try to edit it.
www.listal.com/list/legs-up-irishblue
After editing, it sits for 2 + minutes and then I get this screen:
www.listal.com/list/legs-up-irishblue/edit

I've had this problem before with some of my lists, not all of them. By persevering, they finally get updated but it can take 10 or 12 attempts. It's a relatively recent issue but is occurring more regularly.

i deleted and recreated the list in frustration