Not only that Taz, but here's something else to consider:
If you're using Breeze 5.1, animated .gifs aren't supported.
Although I can't speak for Presenter 6.0 users yet (still waiting
on my upgrade), I've heard that animated .gifs do work in that
environment.
Last note...and this really should be something everyone
needs to consider when crafting decks/presentations with the
intention of publishing...Just because you can make certain things
happen while editing and displaying in PowerPoint (including slide
show mode or F5), that doesn't necessarily mean that things will
STILL work when you publish your content.
Various facets of what you could normally get away with in
Powerpoint simply don't convert well (if at all), especially with
things like custom animations and Action Buttons. And although most
of those "bugs" have been documented I still think we, as users,
need to keep putting the heat on Adobe to improve what they have,
because the reality is that there are a BUNCH of other products
that can do what Breeze/Presenter does, and in some cases, cheaper.
That said, however, I also realize that the list of things
that don't work really isn't that long at all...but better to test
as you build rather than forcing yourself into a bad situation when
it's too late.