I have been successfully running Smath on my 64 bit OpenSuSe 11.2 system under mono and KDE 4.3.5. The only quirk that I have noticed is that the font size drop down menu is missing from the main toolbar. Does anyone know if this is an oversight or a limitation on Linux systems? Great software! I am extremely impressed with the robustness and capabilities (and the fact that it runs on Linux)!