At 1800gmt this evening, Pipe 1 on CNN Pipeline didn't switch to World News live from Atlanta (with Ralitsa Vasileva), but instead stayed with the interstitial news/sport/weather slides. This remained the case until 1813 gmt. At this point, all pipes failed. The preview windows for Pipe 1, 3 and 4 displayed the "Stay Tuned" slide. Pipe 2 was showing the correct stream (the 1-hour live weekend CNN Pipeline show) but was unaccessable to display on the main screen.

Everything returned at 1818gmt.