I load the attached .odp - I notice the nice blue triangle bullets on each item of the slides.
I edit a slide text; save it. Close, re-load. Notice - no blue bullets and the text layout is screwed up.
Not a good one to discover just before a talk ;-)
can't attach; it is http://www.gnome.org/~michael/bullet-test.odp
*** This bug has been marked as a duplicate of bug 37017 ***