Viewing PPTX files via web browser
There is a pretty glaring glitch with the Web App when viewing PPTX files. It will repaginate the slides. Example, if your cover slide starts at 0, the Box Web App will repaginate the slides starting at 1, which can be confusing to people when trying to reference a specific slide. Once you download the file, then the pagination goes back to normal.
I'm hoping this gets fixed in an update.