Steps to repro:

1. create page and attach ppt or pptx
2. add ppt macro
3. specify 0 as slide start number
4. Exhibited behavior (still in Insert ppt lightbox) is no static image avail (broken image icon) for slide 0
5. When saving/previewing page, broken image icon shows.
6. Any other slide number specified as start slide shows static image for that slide number.
7. If start slide left blank, ppt player works as expected from first slide (0).

Verified this in 4.1.2 and 4.1.4.