Una cosa... ¿el procesador que tienes es doble núcleo?
He buscado info sobre el quicktime.qts al que hace referencia el error, y me he encontrado con esto (en ingles):
Problema de un tio:
I'm getting a seemingly random crash in a small app that we
wrotethat opens movies using quicktime.
Sometimes it will crash after a few minutes, sometimes after a few
hours, but always _inside_ quicktime.
Solución que le dan:
After some suggestions from an Apple engineer, we tried turning of hyterthreading on the PCs where we had this problem, and the problem went away! Perhaps you could try the same, and report your findings.
I suspect there's a multiprocessing/hyperthreading-sensitive race condition involving threads created internally inside QT. Thread synchronization requirements are more strict when running on HT/MP computers, which may explain why disabling HT appeared to "fix" the problem.
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¿Quizás poniendole afinidad a un solo núcleo, en caso de que tengas doble, se solucione la cosa?
Salu2