SlideShare is having a scheduled maintenance starting 20:30 PM PST (28th Feb). Some of our servers are getting upgraded during this period.
The maintenance should take anything between 1 – 2 hours, during which time the site will be unavailable. We’ll try to be back up ASAP.
Update (24:00 PST): The maintenance is over…. we are back to life now. Let us know in case you are facing any problems.