I just played my second game of Mac portal today, and before the game started, Steam downloaded an update.<p>It didn't fix any visible bugs for me, but it looks like it introduced a new one. Now when I look into the portals, all I see is black instead of the room on the other side. Yesterday when I played, I could see through portals fine.<p>It is just a glitch on my specific hardware, or did any other Portal Mac player get this too? I figure that if all of us are getting this bug, it'll probably be fixed soon. But if it's just me, I might be outta luck.