Viewport is clipping...

Alright, i’ve recently noticed that there’s been some clipping going on.

on top of my 3d rendering, i’ve been displaying some text, but it worked well enough, so i never really paid a lot of attention to it, like correctness and such.

well, now i started to and i realized that it’s clipping everything to the right, and some things to the bottom…

i went and threw some lines out there, to see if i could make them appear correctly, but no dice.

here’s what i’m doing.
basically, i set up an orthographic projection

glMatrixMode( GL_PROJECTION );
glLoadIdentity( );
glOrtho( -1.0f,1.0f,-1.0f,1.0f,-1.0f,1.0f );

glBegin( GL_LINE_LOOP );
    glColor3f( 0,1,0 );
    glVertex2f( -1.0f,-1.0f );
    glVertex2f( 1.0f,-1.0f );
    glVertex2f( 1.0f,1.0f );
    glVertex2f( -1.0f,1.0f );
glEnd( );

but it’s always chopping off the edge, be it in a window or fullscreen (using win32, not gult)

any ideas?
anyone ever experience similar phenomina?