Segmentation fault in Expyriment

# This script reliably gives segmentation faults after a few cycles, at least on
# Ubuntu 12.04 x64. There appear to be two necessary conditions for the problem
# to occur:
#
# - The window must be opened and closed repeatedly within the same script
# - Fonts/ Text rendering must be involved
#
# This suggests, to me, that there is some kind of issue with pygame.font.init()
# and/ or pygame.font.quit(), but I haven't been able to track the issue beyond
# this.

from expyriment import control, stimuli
import time
control.defaults.initialize_delay = 0
for i in range(10):
    exp = control.initialize()
    print 'Control initialized'
    # The TextLine constructor causes the segmentation fault. The weird thing is
    # that the constructor itself appears to run and complete fine, but somehow
    # after/ during the return of the constructor the segfault happens. In other
    # words, the line 'Stimulus prepared' (below) is not shown, but a debug
    # message at the end of the constructor *is* shown.
    t = stimuli.TextLine('%d' % i)
    # As far as I can tell only TextLine has this porblem, Rectangle works fine.
    # t = stimuli.Rectangle( (100, 100) )
    print 'Stimulus prepared'
    t.present()
    print 'Stimulus presented'
    time.sleep(.1)
    control.end()
    print 'Control ended'