I've actually been paying a bit of attention to this.
Essentially all the disagreement is over Immersion paying MS a portion of royalties and settlement costs they received for licensing their technology to other companies, which was part of their settlement.
It doesn't mean Sony's rumble is going away again, its just MS asserting the rights of their contract with Immersion to receive a portion of those royalties Sony will be paying them to license the tech.
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Essentially all the disagreement is over Immersion paying MS a portion of royalties and settlement costs they received for licensing their technology to other companies, which was part of their settlement.
It doesn't mean Sony's rumble is going away again, its just MS asserting the rights of their contract with Immersion to receive a portion of those royalties Sony will be paying them to license the tech.