One other thing...
Are the problems you are experiencing happening with just this one
document? Or does it happen with multiple other documents?
I haven't had time to test any other, but I suspect this is not the only
one.
Were the problem documents created originally in LibO (or OOo)?
To the best of my knowledge with an early version of OOo.
I've been using LO, OOo, SO, etc. since it was called StarOffice 5.0,
btw.. Impress (or what it was called back then) in StarOffice 5.2 was
very stable and did everything I needed it to do in terms of
presentations... Good old times Since then every major release had
new bugs that made Impress unusable and I had to wait or the .1 or .2.
What format are the documents? Ie, are they .odp? .ppt? .pptx?
ODP.
All the best,
Stephan