Exchange of opinions about charge error preservation

In the context of a denial of en banc rehearing, a concurring and dissenting opinion disputed whether an issue of charge error in an employment case had been preserved below.  Nassar v. UT Southwestern Medical Center, No. 11-10338 (July 19, 2012).  The exchange echoes a similar one in the recent en banc case of Jimenez v. Wood County, 660 F.3d 841 (5th Cir. 2011).