There was a major meeting of Jordan's Muslim Brotherhood over the past month, and one of the most contentious topics was whether it should maintain an official relationship with Hamas.
Some members, considered "doves" in the context of extremist Islam, wanted to distance themselves from Hamas and the clear damage it has done to the Palestinian Arab cause. It also looks like there was some disagreement as to the extent of the Ikhwan's cooperation with the Jordanian government, which the hawks blame for having a peace treaty with Israel.
It appears that the "hawks" won the day, and amid much contention four of the "dove" leaders have resigned from the Muslim Brotherhood's executive council.
This might bring Jordan's Brotherhood more in line with Egypt's branch, which was the source for every radical Sunni Muslim group in existence today.