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.

**Great to know...Mine's doing the same thing.

I bought a Fiscars cutter in the early 90's and I still have it (couldn't afford Olfa back then). No problems with it, but have since gotten the Olfa ergonomic and there's a world of difference! I'd recommend the Olfa. BTW, the liquid referred to in the previous repliesis called Loc-Tite and can be purchased at any hardware store, just be sure you get the least permanent one so you can get the nut off to change blades.

Lock-tite is the liquid tightening 'stuff'.

Love my gingher, olfa would be my second choice

Wow - even with no receipt or anything?? Definitely worth a try. I recently bought a 5-pack of Fiskars replacement blades (1/2 price at Joann's :thumbup:), so I'd like to be able to use them. I noticed that several people are recommending Olfa, but I'm not sure that I could use the Fiskars blades on and Olfa (I've read conflicting answers to that on another thread).

A couple of things:
1. Once you Loctite your nut, you will not be able to remove it to change blades.
2. I finally got to try a Martelli cutter and it is just the greatest thing. It works well with my arthritic hands and the blades are super sharp.

It does sound as though you need a new washer. However, I have made nearly 500 quilts and am still using my original Olfa.

Better Yet~ Buy a Martelli, they have a screw that does not loosen as you cut. They are handed so they fit your hand. If you have a problem, they will make it good, I even had them replace a complete cutter for me because of a screw not being hardened and my using the wrong blade in it.
Fiskars-Chevy, Olfa - Cadillac?, Martelli-Hummer!!

No you cannot use the Fiskars blades on the Olfa, the Olfa's have a tri cutout in the center of the blade and are not interchangeagle with the Fiskars or Martelli cutters. The Fiskars could fit the Martelli, but they are a thinner blade and do not hold an edge like the Martelli blades.
I re-sharpen the blades and the Martelli blades hold up much better and you get more sharpenings from them.