strange graphical problems with r1gl

[kafre]

Hi, i´ve been using for years standard quake opengl renderer with success, but i´m trying r1gl renderer and i find that when i move the mouse or walk/strafe i see a horizontal band blurred about one inch wide that cross the whole monitor. As i move/jump/aim that band moves to upper positions and lower ones. If i dont move the band doesn´t appear; i´ve tried to screenshot it while moving but i can´t see it on screenshots. I´m pretty sure it´s not problem of my monitor as the opengl renderer works perfect. It´s very frustrating as enabling/disabling vsync does nothing and i would like to use r1gl renderer to use hi-res textures. Maybe someone can help me with this?

Thx in advance.