April 22, 2011 Patch

{{Patch layout
 * source      = http://store.steampowered.com/news/5363/
 * source-title = Portal 2 Update Released
 * before      = April 21, 2011 Patch
 * after       = April 29, 2011 Patch
 * notes       =

Portal 2

 * Fixed and added additional error-handing code for crashes in the renderer

}}