Hello,
I´ve problem with Brytenwalda 1.34 too.
PC: Vista, Dx11, ATI 4850
Brytenwalda 1.332 with PL ran, with some crashes during playing (opening troop tree, usw), but arena, battles was ok.
On same PC, same configuration, I installed Brytenwalda 1.34 according "http://forums.taleworlds.com/index.php/topic,136401.0.html".
Tutorial and creating new person is functional, but first play after creation new person (saving trader) always crashed.
Next i tried load saves from 1.332 - global map run (some red error mesages on screen), program crash if i choose "walk througt streets" or "Arena" -> person view, program use shaders. But tutorial run OK.
I can send "postFX.fx, rgl_log.txt, 48700_install.vdf".