I just uploaded my LOADays 2015 slides to slideshare. The talk seems to have been well received; I got a number of positive comments from some attendees, which is always nice.

As an aside, during the talk I did a short demo of how to sign something from within Libreoffice using my eID card. Since the slides were made in Libreoffice Impress, the easiest thing to do was just to sign the slides themselves, which worked perfectly well. So, having uploaded, downloaded, and verified these slides, I can now say with 100% certainty that slideshare does not tamper with files you upload. They may reformat them so it's easier to view on a website, but if you click on the download link, you get the original, untampered version.

At least that's the case if you sign documents, of course; it's always possible that they check for that and special-case such things. Would surprise me, though.