What more can I say? I discovered this problem running the CS4 Master Suite but fumbled through the dialog box and got the install of PixelBender to work. Now that I'm back with CS5 I'm still having the same problem. No language problems anywhere else but in Extension Manager. I'm using a Mac Pro, Snow Leopard, and the CS5 Design Premium Suite. The incorrect language appears to be German, though I don't speak or write German, so I'm not certain. Screen shot below. Thanks!