WHOA!! Am I correct that you are indicating that it's NOT my rotary cutter blade, but the MAT that is making it skip?? Seriously?? I DO have an OLFA mat.... now what?? I bought a Titanium blade and a new Rotary cutter... it cut like hot butter.... for a short time anyway! Hmmmm...... Could it possibly be that we are hitting spots on our mats that aren't in perfect condition causing the blade to skip?? I must admit I get so perturbed after I cut and discovered those areas that are holding by a thread or two!