Tripping over a leap second:
http://phys.org/news/2012-07-wreaks-internet-havoc.html
Good thing there was no java around at Y2K?
Reddit and Mozilla blame Java issues among other causes for website trouble after adding in the latest leap second.
Amazon and LinkedIn also had trouble.
Google reports it has a clever work around.
Nothing about Apple...guess they'll synchronize the universe with iTime at some point.