I have a tendency to hold the rotary cutter at an angle and then it skips. If I remember to hold it straight up then no more skipped cuts!

This is important...it will prevent you from cutting properly and is very easy to do. Good luck

Me too!!! Glad I am not alone on that!! :)
Sass

Is the blade loaded on the cutter correctly? Is the blade turning? I have put the cutter back together wrong without thinking, and the blade did not move. Re-did it, and it was fine.

When you changed the blade did you put it on the correct side of the cutter? Best to double check!

(yes, been there, done that, have the t-shirt:))

Make sur there isn't a slight dip or bow in the table your mat is on. I have that problem if my mat gets in a certain spot on my one table.
:-D

This is something that I did that had some of the same results as you are experiencing. I tightened the screw on the cutter too tight which caused the blade to nick the plastic on my almost new cutter. Thinking it was a bad batch of blades, I kept changing them. When that didn't work I bought a new mat, which I needed anyway, but, still was having the problem. I finally looked closely at my cutter and found the nick on the plastic. It could have been there when I bought it, but I think I caused it from having the screw too tight.

I've occasionally gotten a brand new blade that always skips one thread.

The only solution (that I've com up with) is to replace the blade and hope it's a better one.

Glad to know all is well now! Interesting to read just how many posts were made after this one. I counted 16.

glad to see that someone else picked up on the fact that radiana solved her problem. does anyone read through before answering?