Code:
OpenGL window configuration: colour-buffer = 32bpp, depth-buffer = none
GL_VENDOR: ATI Technologies Inc.
GL_RENDERER: ATI Mobility Radeon HD 4500 Series
GL_VERSION: 3.3.11631 Compatibility Profile Context
GL_EXTENSIONS: GL_AMDX_debug_output GL_AMDX_vertex_shader_tessellator GL_AMD_conservative_depth GL_AMD_debug_output GL_AMD_depth_clamp_separate GL_AMD_draw_buffers_blend GL_AMD_name_gen_delete GL_AMD_performance_monitor GL_AMD_pinned_memory GL_AMD_sample_positions GL_AMD_seamless_cubemap_per_texture GL_AMD_shader_stencil_export GL_AMD_texture_cube_map_array GL_AMD_texture_texture4 GL_AMD_vertex_shader_tessellator GL_ARB_ES2_compatibility GL_ARB_base_instance GL_ARB_blend_func_extended GL_ARB_color_buffer_float GL_ARB_compressed_texture_pixel_storage GL_ARB_conservative_depth GL_ARB_copy_buffer GL_ARB_depth_buffer_float GL_ARB_depth_clamp GL_ARB_depth_texture GL_ARB_draw_buffers GL_ARB_draw_buffers_blend GL_ARB_draw_elements_base_vertex GL_ARB_draw_instanced GL_ARB_explicit_attrib_location GL_ARB_fragment_coord_conventions GL_ARB_fragment_program GL_ARB_fragment_program_shadow GL_ARB_fragment_shader GL_ARB_framebuffer_object GL_ARB_framebuffer_sRGB GL_ARB_geometry_shader4 GL_ARB_get_program_binary GL_ARB_half_float_pixel GL_GL_AMDX_debug_output GL_AMDX_vertex_shader_tessellator GL_AMD_conservative_depth GL_AMD_debug_output GL_AMD_depth_clamp_separate GL_AMD_draw_buffers_blend GL_AMD_name_gen_delete GL_AMD_performance_monitor GL_AMD_pinned_memory GL_AMD_sample_positions GL_AMD_seamless_cubemap_per_texture GL_AMD_shader_stencil_export GL_AMD_texture_cube_map_array GL_AMD_texture_texture4 GL_AMD_vertex_shader_tessellator GL_ARB_ES2_compatibility GL_ARB_base_instance GL_ARB_blend_func_extended GL_ARB_color_buffer_float GL_ARB_compressed_texture_pixel_storage GL_ARB_conservative_depth GL_ARB_copy_buffer GL_ARB_depth_buffer_float GL_ARB_depth_clamp GL_ARB_depth_texture GL_ARB_draw_buffers GL_ARB_draw_buffers_blend GL_ARB_draw_elements_base_vertex GL_ARB_draw_instanced GL_ARB_explicit_attrib_location GL_ARB_fragment_coord_conventions GL_ARB_fragment_program GL_ARB_fragment_program_shadow GL_ARB_fragment_shader GL_ARB_framebuffer_object GL_ARB_framebuffer_sRGB GL_ARB_geometry_shader4 GL_ARB_get_program_binary GL_ARB_half_float_pixel GL_GL_AMDX_debug_output GL_AMDX_vertex_shader_tessellator GL_AMD_conservative_depth GL_AMD_debug_output GL_AMD_depth_clamp_separate GL_AMD_draw_buffers_blend GL_AMD_name_gen_delete GL_AMD_performance_monitor GL_AMD_pinned_memory GL_AMD_sample_positions GL_AMD_seamless_cubemap_per_texture GL_AMD_shader_stencil_export GL_AMD_texture_cube_map_array GL_AMD_texture_texture4 GL_AMD_vertex_shader_tessellator GL_ARB_ES2_compatibility GL_ARB_base_instance GL_ARB_blend_func_extended GL_ARB_color_buffer_float GL_ARB_compressed_texture_pixel_storage GL_ARB_conservative_depth GL_ARB_copy_buffer GL_ARB_depth_buffer_float GL_ARB_depth_clamp GL_ARB_depth_texture GL_ARB_draw_buffers GL_ARB_draw_buffers_blend GL_ARB_draw_elements_base_vertex GL_ARB_draw_instanced GL_ARB_explicit_attrib_location GL_ARB_fragment_coord_conventions GL_ARB_fragment_program GL_ARB_fragment_program_shadow GL_ARB_fragment_shader GL_ARB_framebuffer_object GL_ARB_framebuffer_sRGB GL_ARB_geometry_shader4 GL_ARB_get_program_binary GL_ARB_half_float_pixel GL_GL_AMDX_debug_output GL_AMDX_vertex_shader_tessellator GL_AMD_conservative_depth GL_AMD_debug_output GL_AMD_depth_clamp_separate GL_AMD_draw_buffers_blend GL_AMD_name_gen_delete GL_AMD_performance_monitor GL_AMD_pinned_memory GL_AMD_sample_positions GL_AMD_seamless_cubemap_per_texture GL_AMD_shader_stencil_export GL_AMD_texture_cube_map_array GL_AMD_texture_texture4 GL_AMD_vertex_shader_tessellator GL_ARB_ES2_compatibility GL_ARB_base_instance GL_ARB_blend_func_extended GL_ARB_color_buffer_float GL_ARB_compressed_texture_pixel_storage GL_ARB_conservative_depth GL_ARB_copy_buffer GL_ARB_depth_buffer_float GL_ARB_depth_clamp GL_ARB_depth_texture GL_ARB_draw_buffers GL_ARB_draw_buffers_blend GL_ARB_draw_elements_base_vertex GL_ARB_draw_instanced GL_ARB_explicit_attrib_location GL_ARB_fragment_coord_conventions GL_ARB_fragment_program GL_ARB_fragment_program_shadow GL_ARB_fragment_shader GL_ARB_framebuffer_object GL_ARB_framebuffer_sRGB GL_ARB_geometry_shader4 GL_ARB_get_program_binary GL_ARB_half_float_pixel GL_GL_AMDX_debug_output GL_AMDX_vertex_shader_tessellator GL_AMD_conservative_depth GL_AMD_debug_output GL_AMD_depth_clamp_separate GL_AMD_draw_buffers_blend GL_AMD_name_gen_delete GL_AMD_performance_monitor GL_AMD_pinned_memory GL_AMD_sample_positions GL_AMD_seamless_cubemap_per_texture GL_AMD_shader_stencil_export GL_AMD_texture_cube_map_array GL_AMD_texture_texture4 GL_AMD_vertex_shader_tessellator GL_ARB_ES2_compatibility GL_ARB_base_instance GL_ARB_blend_func_extended GL_ARB_color_buffer_float GL_ARB_compressed_texture_pixel_storage GL_ARB_conservative_depth GL_ARB_copy_buffer GL_ARB_depth_buffer_float GL_ARB_depth_clamp GL_ARB_depth_texture GL_ARB_draw_buffers GL_ARB_draw_buffers_blend GL_ARB_draw_elem
Anisotropic filtering possible (max 16x)
Loaded Texture: "/home/hutty/apps/xon/Xonotic/mapping/netradiant-1.5.0-20120114/install/bitmaps/notex.bmp"
OpenGL window configuration: colour-buffer = 32bpp, depth-buffer = 24bpp
Unable to find default tag file /home/hutty/apps/xon/Xonotic/mapping/netradiant-1.5.0-20120114/install/xonotic.game/shadertags.xml. No tag support.
OpenGL window configuration: colour-buffer = 32bpp, depth-buffer = none
Texture load failed: "textures/"
brushDragNewhere is what my working netradiant says (linux mint 12 64 bit ati mobility)
mine shows the "texture load failed" thing after dragging the first brush ... so it doesn't mean anything
One thing to try is BEFORE starting radiant turn you theme to windows classic (ugly win 95 style) does it still have issues after that?

