The PC version of Portal 2 has gotten a patch which will automatically be applied the next time you start up Steam. While most of the fixes are for graphical problems, one fix - one that corrects stuck players on Chapter 6 - is a welcomed improvement.
The game also got several improvements, including better Mac OSX support and better support for Intel Mobile Series chipsets - perfect for those on the go co-op sessions.
Fixed: Occasional crash after Alt-Tab/minimizing or running in a window on certain graphics hardware. Fixed: Crashes and/or graphical glitches after changing video settings without exiting game Fixed: Player stuck at the beginning of Chapter 6 Fixed: Crash attempting to use other weapons (e.g. mods) with Portal 2 Fixed: Mouse cursor doesn’t highlight UI elements in game on Mac OSX Fixed: Numerous localization bugs and improvements (also added Czech and Turkish localized text) Fixed: Overflow bug in keyvalues Fixed: Voice functionality regression (voice again enabled by default) Fixed: Joystick now defaults to off in order to avoid issues with non-joystick hardware that registers itself as a joystick Fixed: French sentences are not wrapping correctly in subtitles and commentary Improved: Handling of Mac OSX crashes Improved: Updates and bug fixes to Robot Enrichment Improved: Reliability on unsupported Intel Mobile Series 4 Express chipsets Removed: Unsupported console commands (“retry”, “switch_teams”) that caused problems if used