It didn't make any difference with mine, but I guess it may cause troubles with different types of popup blockers.
I appreciate your bringing it to everyone's attention :-)
I hope that you were able to make the presentation work and I hope also that you enjoyed it.
I was a bit unhappy that there wasn't music along with it, but that would have increased the bandwidth load and general complexity of the presentation dramatically I suppose.
BTW, people might also be interested in these areas at the Vatican's web site where you can download free music: