Mathematica is being used successfully on Ubuntu, with users reporting that version 7 works well, while version 6 had issues related to the Qt library. One user noted that version 7.02 resolves these problems. Another user mentioned experiencing startup issues related to graphics drivers, which were resolved with assistance from Wolfram. Overall, users find Mathematica functional on various Ubuntu versions, including 10.04. The community is sharing experiences and solutions for running Mathematica on Linux systems.