I think the error message + the command already says it all.

 ./src/freedroidRPG -r 327x387                                       matthias@t60 

Hello, this is FreedroidRPG, version 0.14.1+svn.
This seems to be a development version, so we'll exit on floating point exceptions.
Video system type: x11.
Using screen resolution 327 x 387.

Testing if color depth 32 bits is available... YES.

video mode set (bpp=24 RGBA=8880 depth=24)
-OpenGL-------------------------------------------------------
Vendor     : X.Org R300 Project
Renderer   : Gallium 0.4 on ATI RV515
Version    : 2.1 Mesa 7.11
Extensions : GL_ARB_multisample GL_EXT_abgr GL_EXT_bgra GL_EXT_blend_color
GL_EXT_blend_logic_op GL_EXT_blend_minmax GL_EXT_blend_subtract
GL_EXT_copy_texture GL_EXT_polygon_offset GL_EXT_subtexture
GL_EXT_texture_object GL_EXT_vertex_array GL_EXT_compiled_vertex_array
GL_EXT_texture GL_EXT_texture3D GL_IBM_rasterpos_clip GL_ARB_point_parameters
GL_EXT_draw_range_elements GL_EXT_packed_pixels GL_EXT_point_parameters
GL_EXT_rescale_normal GL_EXT_separate_specular_color GL_EXT_texture_edge_clamp
GL_SGIS_generate_mipmap GL_SGIS_texture_border_clamp GL_SGIS_texture_edge_clamp
GL_SGIS_texture_lod GL_ARB_multitexture GL_IBM_multimode_draw_arrays
GL_IBM_texture_mirrored_repeat GL_ARB_texture_cube_map GL_ARB_texture_env_add
GL_ARB_transpose_matrix GL_EXT_blend_func_separate GL_EXT_fog_coord
GL_EXT_multi_draw_arrays GL_EXT_secondary_color GL_EXT_texture_env_add
GL_EXT_texture_filter_anisotropic GL_EXT_texture_lod_bias
GL_INGR_blend_func_separate GL_NV_blend_square GL_NV_light_max_exponent
GL_NV_texgen_reflection GL_NV_texture_env_combine4 GL_SUN_multi_draw_arrays
GL_ARB_texture_border_clamp GL_ARB_texture_compression GL_EXT_framebuffer_object
GL_EXT_texture_env_dot3 GL_MESA_window_pos GL_NV_packed_depth_stencil
GL_NV_texture_rectangle GL_ARB_depth_texture GL_ARB_occlusion_query
GL_ARB_shadow GL_ARB_texture_env_combine GL_ARB_texture_env_crossbar
GL_ARB_texture_env_dot3 GL_ARB_texture_mirrored_repeat GL_ARB_window_pos
GL_EXT_stencil_two_side GL_EXT_texture_cube_map GL_APPLE_packed_pixels
GL_APPLE_vertex_array_object GL_ARB_draw_buffers GL_ARB_fragment_program
GL_ARB_fragment_shader GL_ARB_shader_objects GL_ARB_vertex_program
GL_ARB_vertex_shader GL_ATI_draw_buffers GL_ATI_texture_env_combine3
GL_ATI_texture_float GL_EXT_shadow_funcs GL_EXT_stencil_wrap GL_MESA_pack_invert
GL_MESA_ycbcr_texture GL_ARB_fragment_program_shadow GL_ARB_half_float_pixel
GL_ARB_occlusion_query2 GL_ARB_point_sprite GL_ARB_shading_language_100
GL_ARB_sync GL_ARB_texture_non_power_of_two GL_ARB_vertex_buffer_object
GL_ATI_blend_equation_separate GL_EXT_blend_equation_separate GL_OES_read_format
GL_ARB_color_buffer_float GL_ARB_pixel_buffer_object
GL_ARB_texture_compression_rgtc GL_ARB_texture_float GL_ARB_texture_rectangle
GL_ATI_texture_compression_3dc GL_EXT_pixel_buffer_object
GL_EXT_texture_compression_rgtc GL_EXT_texture_mirror_clamp
GL_EXT_texture_rectangle GL_EXT_texture_sRGB GL_ARB_framebuffer_object
GL_EXT_framebuffer_blit GL_EXT_framebuffer_multisample
GL_EXT_packed_depth_stencil GL_ARB_vertex_array_object GL_ATI_separate_stencil
GL_ATI_texture_mirror_once GL_EXT_gpu_program_parameters
GL_EXT_texture_compression_latc GL_EXT_texture_env_combine
GL_EXT_texture_sRGB_decode GL_OES_EGL_image GL_ARB_copy_buffer
GL_ARB_half_float_vertex GL_ARB_instanced_arrays GL_ARB_map_buffer_range
GL_ARB_texture_rg GL_ARB_texture_swizzle GL_ARB_vertex_array_bgra
GL_EXT_separate_shader_objects GL_EXT_texture_swizzle GL_EXT_vertex_array_bgra
GL_NV_conditional_render GL_ARB_draw_elements_base_vertex
GL_ARB_explicit_attrib_location GL_ARB_fragment_coord_conventions
GL_ARB_provoking_vertex GL_ARB_sampler_objects GL_ARB_shader_texture_lod
GL_EXT_provoking_vertex GL_EXT_texture_snorm GL_MESA_texture_signed_rgba
GL_NV_texture_barrier GL_ARB_robustness 

ALSA lib pcm.c:7316:(snd_pcm_recover) underrun occurred
ALSA lib pcm.c:7316:(snd_pcm_recover) underrun occurred
ALSA lib pcm.c:7316:(snd_pcm_recover) underrun occurred

----------------------------------------------------------------------
Freedroid has encountered a problem:
In function: widget_background_load_3x3_tiles.
FreedroidRPG package and version number: freedroidrpg 0.14.1+svn.
The following tile set cannot be loaded: widgets/quest.
Minimum required size: 327 x 387.
Background widget size: 200 x 236.


If you encounter this message, please inform the Freedroid developers
about the problem, by either

  sending e-mail to:
    freedroid-discussion AT lists.sourceforge.net
  mention it to someone of the developers on our IRC channel:
    channel: #freedroid on irc.freenode.net
  post on our forum at:
    https://sourceforge.net/apps/phpbb/freedroid
  report a bug on our tracker at:
    https://sourceforge.net/tracker/?group_id=54521&atid=474016

Thanks a lot!

Freedroid will terminate now to draw attention to the problems it could
not resolve.  Sorry if that interrupts a major game of yours...

----------------------------------------------------------------------
Termination of freedroidRPG initiated...Thank you for playing freedroidRPG.

 r5049

I'm sorry, I don't understand the problem here. What's wrong?

In r5153, the error comes from "src/widgets/widget_background.c".

I'm not entirely certain if we can avoid having this hard minimum on the size of
the screen. In any case, having a screen that small would make it be very hard
to play.

So I don't get  what the error is. You're reporting as a bug... what exactly?

The minimum required size is about the widget size, not the screen size. It is
thus a debug message, not really intended for users.
I committed a less confusing message in svn r5209