Agree with everything Nsgarch said.
Zenblaster's guidance on antiskate is backwards. Reducing antiskate will cause the arm to move more toward the center, not less. Using a blank side is certainly not meaningful, unless you play a lot of blank sides of course. I doubt your problem has anything to do with antiskating anyway. As Nsgarch said, you're probably using too much as it is already.
You say you checked "everything", but did you specifically adjust overhang and cantilever angle with an alignment protractor, either SME or otherwise? If the new cartridge is even slightly different in length than the old one (from the stylus to the plane of the mounting screws), your symptoms could happen.
Also, check the dressing of your tonearm wires. They could have become twisted or be brushing on something.
Zenblaster's guidance on antiskate is backwards. Reducing antiskate will cause the arm to move more toward the center, not less. Using a blank side is certainly not meaningful, unless you play a lot of blank sides of course. I doubt your problem has anything to do with antiskating anyway. As Nsgarch said, you're probably using too much as it is already.
You say you checked "everything", but did you specifically adjust overhang and cantilever angle with an alignment protractor, either SME or otherwise? If the new cartridge is even slightly different in length than the old one (from the stylus to the plane of the mounting screws), your symptoms could happen.
Also, check the dressing of your tonearm wires. They could have become twisted or be brushing on something.