Welcome to the 161st issue of Softpedia Linux Weekly! The following Linux-based operating systems have been announced last week: Linux Mint 11 LXDE, GNOME 3 Live, Linux Mint Debian 201108 RC, Puppy Linux 5.2.8 and BackTrack 5 R1. In other news: Mozilla released the highly anticipated Thunderbird 6.0 mail client for Linux operating systems; Mark Sh..