1] Could be a memory issue. I had some problems with a
project but generating from a machine with 3gb ram fixed it.
2] If images have any alignment shown in the RH insert image
dialogue, that does cause this problem. What you have done is a bit
different but it could be Word interprets it the same way. Remove
the centred attribute in both RH and Word and then try again. You
can always add the attribute back in Word later.
3] I'd leave the third one until all else fails.
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