Just out of curiosity, are you using component video or HDMI for the link between player and TV? Component video will only go up to 1080i.
As Gonk says, it may also be the TV; check the manual carefully.
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Outlaw 990/7500/LFM1+/2xLFM1 EX
Kef 107 with KUBE
Kef XQ2c center
Kef 3005 surrounds
Samsung HL-67a750
Sony BDP-S301 Blu-Ray
Toshiba HD-A2
Denon CD
Harmony 880
Comcast HD DVR with external drive
Nintendo Wii