Frankie70 (803801) writes "Slideshare has ditched Adobe Flash technology entirely, and rebuilt its website using the HTML5 markup language. This means that SlideShare is now viewable on every kind of mobile device, from iPads to iPhones to Android devices and beyond." Link to Original Source
If it happens once, it's a bug. If it happens twice, it's a feature.
If it happens more than twice, it's a design philosophy.