My bikes are secured using a couple of Kryptonite locks and both have seized in quick succession. 

Luckily, the bikes were unlocked at the time and as I bought them there my local bike shop is happy to send them back to the manufacturer.  Both of the locks are less than 2 years old.

I wondered if anyone else has had this issue with this make? 

My Abus and Litelok padlocks are functioning fine in the same environment.