the sequencer shows a blank (white) image when showing any kind of image data (like pictures or videos), it is not the same as #20567, because i can grab to move and zoom the preview, it just shows all white, even when a proxy is generated, and also with all kind of preview types (chroma, histogram, etc...), blender also slows down alot when the current playback is at any image/video sequence, the audio can be heard and the render works fine, the problem is just the preview

This isn't happening in blender 2.49 but it does happen in blender 2.59 and 2.63a

system:
windows 7 32 bits (for some reason blender claims that my system is 64 bits...)

============================================
= 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 (32 bits really....)
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:\Users\Rafael\AppData\Roaming\Blender Foundation\Blender\2.59\datafiles\
config: C:\Users\Rafael\AppData\Roaming\Blender Foundation\Blender\2.59\config\
scripts : C:\Users\Rafael\AppData\Roaming\Blender Foundation\Blender\2.59\scripts\
autosave: C:\Users\Rafael\AppData\Roaming\Blender Foundation\Blender\2.59\autosave\
tempdir: C:\Users\Rafael\AppData\Local\Temp\

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

renderer: GDI Generic
vendor: Microsoft Corporation
version: 1.1.0
extensions:
GL_WIN_swap_hint GL_EXT_bgra GL_EXT_paletted_texture

gpu: intel g45/g43 express chipset
directx 11