Program crahes when the function "cvThreshold" is called (Bug #71)

Program crahes when the function "cvThreshold" is called. This code crashes:

from opencv import cv 
from opencv import highgui as hg
image=hg.cvLoadImage('D:\\system\\Desktop\\lena.jpg')
red=cv.cvCreateImage(cv.cvGetSize(image),8,1)
binary=cv.cvCreateImage(cv.cvGetSize(image),8,1)
print 1
cv.cvSplit(image,red,None,None,None)
print 2
cv.cvThreshold(red,binary,42,255,cv.CV_THRESH_BINARY)
print 3

In this code we use "cvSplit" function instead "cvCvtColor" because of Ticket #70 :-)
If we call this function in a new thread it works normally. But in WinXP this trick doesn@t work.
Following code doesn@t crash in Win Vista, but crashes in Win XP:

def track():

    image=hg.cvLoadImage('D:\\system\\Desktop\\lena.jpg')
    red=cv.cvCreateImage(cv.cvGetSize(image),8,1)
    binary=cv.cvCreateImage(cv.cvGetSize(image),8,1)
    print 1
    cv.cvSplit(image,red,None,None,None)
    print 2
    cv.cvThreshold(red,binary,42,255,cv.CV_THRESH_BINARY)
    print 3

if +name+ == '+main+':
    import threading
    p1=threading.Thread(target=track)
    p1.start()

Environment: OpenCV 2.0.0.a, Python 2.6, SWIG python bindings, 2 different mashines with Windows Vista Home Premium and Windows XP Pro SP3