The Interface Editor Window buttons (and sometimes icons) are drawn incrementally larger than before upon redraws. A new Interface Editor Window has the buttons and icons very tiny. The increase in size is occurs noticeably after making a render of image and go "Back to Previous" when the interface is redrawn, or after re-sizing the editor window (hiding another interface window).

Attached is an image with an older Editor Window now having large buttons, and a newly made Editor Window that has the tiny buttons.

Here is the system-info.txt:

============================================
= Blender 2.59 (sub 0) System Information =
============================================

Blender:
============================================

version 2.59 (sub 0), revision 39307. Release
build date: 2011-08-13, 11:44:03
platform: Windows:64bit
binary path: C:\Program Files\Blender Foundation\Blender\blender.exe
build cflags: /nologo /Ob1 /J /W0 /Gd /wd4018 /wd4244 /wd4305 /wd4800 /wd4065 /wd4267 /we4013 /openmp -DWITH_AUDASPACE -O2 -DNDEBUG -O2 -DNDEBUG -DWIN32 -D_CONSOLE -D_LIB -D_CRT_SECURE_NO_DEPRECATE /openmp -DWITH_AUDASPACE
build cxxflags: /nologo /Ob1 /J /W0 /Gd /wd4018 /wd4244 /wd4305 /wd4800 /wd4065 /wd4267 /we4013 /openmp -DWITH_AUDASPACE /EHsc /openmp -DWITH_AUDASPACE -O2 -DNDEBUG -O2 -DNDEBUG -DWIN32 -D_CONSOLE -D_LIB -D_CRT_SECURE_NO_DEPRECATE /openmp -DWITH_AUDASPACE
build linkflags: /SUBSYSTEM:CONSOLE /MACHINE:IX86 /STACK:2097152 /INCREMENTAL:NO /LARGEADDRESSAWARE /NODEFAULTLIB:msvcrt.lib /NODEFAULTLIB:msvcmrt.lib /NODEFAULTLIB:msvcurt.lib /NODEFAULTLIB:msvcrtd.lib
build system: SCons

Python:
============================================

version: 3.2 (r32:88445, Mar 4 2011, 02:13:51) [MSC v.1500 32 bit (Intel)]
paths:
C:\Program Files\Blender Foundation\Blender\2.59\scripts\addons
C:\Program Files\Blender Foundation\Blender\2.59\scripts\startup
C:\Program Files\Blender Foundation\Blender\2.59\scripts\modules
C:\Program Files\Blender Foundation\Blender\2.59\python
C:\Program Files\Blender Foundation\Blender\python32.zip
C:\Program Files\Blender Foundation\Blender\2.59\python\DLLs
C:\Program Files\Blender Foundation\Blender\2.59\python\lib
C:\Program Files\Blender Foundation\Blender
C:\Program Files\Blender Foundation\Blender\2.59\scripts\addons\modules

Directories:
============================================

scripts: ['C:\\Program Files\\Blender Foundation\\Blender\\2.59\\scripts']
user scripts: None
datafiles: C:\Documents and Settings\SAINT 13\Application Data\Blender Foundation\Blender\2.59\datafiles\
config: C:\Documents and Settings\SAINT 13\Application Data\Blender Foundation\Blender\2.59\config\
scripts : C:\Documents and Settings\SAINT 13\Application Data\Blender Foundation\Blender\2.59\scripts\
autosave: C:\Documents and Settings\SAINT 13\Application Data\Blender Foundation\Blender\2.59\autosave\
tempdir: C:\DOCUME~1\SAINT1~1\LOCALS~1\Temp\

OpenGL
============================================

renderer: ATI Mobility Radeon X2300 x86/SSE2
vendor: ATI Technologies Inc.
version: 2.0.6471 WinXP Release
extensions:
GL_ARB_multitexture GL_EXT_texture_env_add
GL_EXT_compiled_vertex_array GL_S3_s3tc GL_ARB_depth_texture
GL_ARB_fragment_program GL_ARB_fragment_program_shadow
GL_ARB_fragment_shader GL_ARB_multisample GL_ARB_occlusion_query
GL_ARB_point_parameters GL_ARB_point_sprite GL_ARB_shader_objects
GL_ARB_shading_language_100 GL_ARB_shadow GL_ARB_shadow_ambient
GL_ARB_texture_border_clamp GL_ARB_texture_compression
GL_ARB_texture_cube_map GL_ARB_texture_env_add
GL_ARB_texture_env_combine GL_ARB_texture_env_crossbar
GL_ARB_texture_env_dot3 GL_ARB_texture_float
GL_ARB_texture_mirrored_repeat GL_ARB_texture_rectangle
GL_ARB_transpose_matrix GL_ARB_vertex_blend
GL_ARB_vertex_buffer_object GL_ARB_pixel_buffer_object
GL_ARB_vertex_program GL_ARB_vertex_shader GL_ARB_window_pos
GL_ARB_draw_buffers GL_ATI_draw_buffers GL_ATI_element_array
GL_ATI_envmap_bumpmap GL_ATI_fragment_shader GL_ATI_map_object_buffer
GL_ATI_separate_stencil GL_ATI_shader_texture_lod
GL_ATI_texture_compression_3dc GL_ATI_texture_env_combine3
GL_ATI_texture_float GL_ATI_texture_mirror_once
GL_ATI_vertex_array_object GL_ATI_vertex_attrib_array_object
GL_ATI_vertex_streams GL_ATIX_texture_env_combine3
GL_ATIX_texture_env_route GL_ATIX_vertex_shader_output_point_size
GL_EXT_abgr GL_EXT_bgra GL_EXT_blend_color GL_EXT_blend_func_separate
GL_EXT_blend_minmax GL_EXT_blend_subtract GL_EXT_clip_volume_hint
GL_EXT_draw_range_elements GL_EXT_fog_coord GL_EXT_framebuffer_object
GL_EXT_multi_draw_arrays GL_EXT_packed_pixels GL_EXT_point_parameters
GL_EXT_rescale_normal GL_EXT_secondary_color
GL_EXT_separate_specular_color GL_EXT_shadow_funcs GL_EXT_stencil_wrap
GL_EXT_texgen_reflection GL_EXT_texture3D
GL_EXT_texture_compression_s3tc GL_EXT_texture_cube_map
GL_EXT_texture_edge_clamp GL_EXT_texture_env_combine
GL_EXT_texture_env_dot3 GL_EXT_texture_filter_anisotropic
GL_EXT_texture_lod_bias GL_EXT_texture_mirror_clamp
GL_EXT_texture_object GL_EXT_texture_rectangle GL_EXT_vertex_array
GL_EXT_vertex_shader GL_HP_occlusion_test GL_NV_blend_square
GL_NV_occlusion_query GL_NV_texgen_reflection GL_SGI_color_matrix
GL_SGIS_generate_mipmap GL_SGIS_multitexture
GL_SGIS_texture_border_clamp GL_SGIS_texture_edge_clamp
GL_SGIS_texture_lod GL_SUN_multi_draw_arrays GL_WIN_swap_hint
WGL_EXT_extensions_string WGL_EXT_swap_control