On November 7, a 3-judge U.S. District Court in Texas issued an order, providing for somewhat later candidate filing deadlines for the Texas March 2012 primary. Candidates for all offices (including the presidential primary) now will file between November 28, 2011, and December 15, 2011. The old filing period had been November 12 to December 12. The case is Perez v State of Texas, western district, 11-cv-360.
The reason for the order is that the boundaries of the legislative districts may be invalidated by another 3-judge court in Washington, D.C. Having a somewhat later filing deadline gives more time for everyone to know what the district boundaries will be. Thanks to Tony Roza for this news.