Hey, I use Ubuntu 12.04 Precision Pangolin and I have tried the 4 installers that you provided the .deb installer, the tar.gz the .sh install and the last one that you said was unsopported. The .sh and Tar.gz installed world painter correctly, but I can't run the porgram. The startup screen pops up for half a second and then closes. I have Open JDK 6 and 7 and I have l even tried tinkering around with the options file, but to no avail. I could not find a video or guide to running it on ubuntu on Youtube. This program looks amazing I hope there is someone on here who could help me, point me to a guide or tell me if I need anything else to run it.