spark2 crash HELP

SPARK2
SPK_Renderer.h

inline RenderBuffer* Renderer::attachRenderBuffer(const Group& group) const
{
return NULL;
}

I am pretty sure this causes my crash. GL stack underflow and cannot read memory errors at glDrawArray call after
Is this how its meant to be because it just assigns NULL to the renderer and thats baaad

it's not the renderer that is NULL, it is the render buffer : i.e. where the renderer writes data before sending them to the GPU. This method is overidden in derived renderers, this is the default behaviour. Not all renderer will need a render buffer. For instance, the GLPointRenderer doesnt need it as data are taken directly from the particle data. This saves a pass of buffering.

For you error, a gl stack underflow means a GL stack has been popped when it has no more element in it. Typically this will be either a matrix stack or the attrib stack.
Check if you dont have a glPopMatrix that does not go with a glPushMatrix and the same with glPush/PopAttrib. Maybe you re using GLRenderer::save/restoreGLStates. Those must be in couple to.