It must be a fairly common issue for Fiskars. I called to complain about my stinky cutting mat and asked about my rotary cutter which had the same issue... they sent me a replacement one which I have to admit I have not opened. I no longer use Fiskars rotary cutters for fabric though. I use them for cutting paper which I don't do as often...
Give them a call and see if they'll take care of yours. It is a safety issue and they didn't even ask a single question about mine. They had me take a picture and email it to them and they replaced it quickly. I received it literally 2 days later.