Mesa 8.0.3 on Windows

Hi,
I have built Mesa 8.0.3 on Windows(x64) to use as an optional GDI OpenGL 
renderer ( for when users connect over Remote Desktop).
I am testing it as a "drop-in" replacement for the default OpenGL32.DLL, 
so after building Mesa, I copied the opengl32.dll and glu32.dll from the 
Mesa debug build into my application area.

Unfortunately, the application "ASSERTS" the first time it tries to 
render a window, with info->BytesPerBlock==0. A quick look shows the
format is MESA_FORMAT_NONE


GLint
_mesa_get_format_bytes(gl_format format)
{
    const struct gl_format_info *info = _mesa_get_format_info(format);
    ASSERT(info->BytesPerBlock);
    ASSERT(info->BytesPerBlock <= MAX_PIXEL_BYTES ||
           _mesa_is_format_compressed(format));
    return info->BytesPerBlock;
}


      opengl32.dll!_wassert(const wchar_t * expr, const wchar_t * 
filename, unsigned int lineno)  Line 325    C
 >    opengl32.dll!_mesa_get_format_bytes(gl_format format)  Line 1556 + 
0x26 bytes    C
      opengl32.dll!_swrast_map_soft_renderbuffer(gl_context * ctx, 
gl_renderbuffer * rb, unsigned int x, unsigned int y, unsigned int w, 
unsigned int h, unsigned int mode, unsigned char * * out_map, int * 
out_stride)  Line 191 + 0xd bytes    C
      opengl32.dll!map_attachment(gl_context * ctx, gl_framebuffer * fb, 
gl_buffer_index buffer)  Line 588    C
      opengl32.dll!_swrast_map_renderbuffers(gl_context * ctx)  Line 
667    C
      opengl32.dll!_swrast_span_render_start(gl_context * ctx)  Line 
851    C
      opengl32.dll!_swrast_render_start(gl_context * ctx)  Line 869    C
      opengl32.dll!_swsetup_RenderStart(gl_context * ctx)  Line 205    C
      opengl32.dll!run_render(gl_context * ctx, tnl_pipeline_stage * 
stage)  Line 278    C
      opengl32.dll!_tnl_run_pipeline(gl_context * ctx)  Line 163 + 0x12 
bytes    C
      opengl32.dll!_tnl_draw_prims(gl_context * ctx, const 
gl_client_array * * arrays, const _mesa_prim * prim, unsigned int 
nr_prims, const _mesa_index_buffer * ib, unsigned int min_index, 
unsigned int max_index)  Line 525    C
      opengl32.dll!_tnl_vbo_draw_prims(gl_context * ctx, const 
gl_client_array * * arrays, const _mesa_prim * prim, unsigned int 
nr_prims, const _mesa_index_buffer * ib, unsigned char 
index_bounds_valid, unsigned int min_index, unsigned int max_index, 
gl_transform_feedback_object * tfb_vertcount)  Line 424    C
      opengl32.dll!vbo_save_playback_vertex_list(gl_context * ctx, void 
* data)  Line 312    C
      opengl32.dll!ext_opcode_execute(gl_context * ctx, gl_dlist_node * 
node)  Line 603    C
      opengl32.dll!execute_list(gl_context * ctx, unsigned int list)  
Line 7505 + 0x12 bytes    C
      opengl32.dll!_mesa_CallList(unsigned int list)  Line 8923    C
      opengl32.dll!glCallList(unsigned int list)  Line 100    C


Any help greatly appreciated.


Andrew