How long have you had it ? Has it been in the same place or has it been moved recently ? Biggest problem with these is usually too much water ! But if you have had it a while and are used to its water needs may be something else! https://www.google.com/search?q=echevaria+leaf+tips+browning&ie=utf-8&oe=utf-8&client=firefox-b This may help !
it looks like physical damage to me. I had to look hard to see it. did it get turned upside down at some point?
No way. Plants that use little water have slow metabolism. Nature of the little beasties. If you have a hard time there is a fellow in the UK I can get you to that can help. Just pm me as he mods another site.
Even the re-potting can cause something like this ! It can take months to recover ! They do not like change !
