The following CentOS 5 updates has been released: CESA-2011:0474 CentOS 5 x86_64 thunderbird Update, CESA-2011:0474 CentOS 5 i386 thunderbird Update, CESA-2011:0471 CentOS 5 x86_64 firefox Update, CESA-2011:0471 CentOS 5 i386 firefox Update, CESA-2011:0472 CentOS 5 x86_64 nss Update, and CESA-2011:0472 CentOS 5 i386 nss Update

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