April 22, 2011 Patch/da

{{Patch layout
 * source      = http://store.steampowered.com/news/5363/
 * source-title = Portal 2 Update Released
 * before      = Patch d. 21. April 2011
 * current     = Patch d. 22. April 2011
 * after       = Patch d. 29. April 2011
 * notes       =

Portal 2
}}
 * Rettet og tilføjet ekstra fejl-behandlings kode for nedbrud i renderen