Actually I can say that I read everything on KE-Forum concerning this issue for at least a year now.
There has been no confirmation from Knifeedge that:
- there is an issue with the controllers
- the design of these pins has been changed

Actually they do replace these controllers, maybe even if warranty is over (but you have to pay shipping).
No customer on KE-forum did confirm any design-changes till now.

If there is other information maybe they only gave it to people calling them via phone or e-mail.

Jörg