I'm running both Arduino 0022 and Arduino 1.0 on Linux (Fedora 16), and using a Duemilanove. I have no problems whatsoever with version 0022. I downloaded the latest Arduino 1.0 IDE and it executes well, compiles well, but the Serial Port menu item (under Tools) is "grayed out". Now... if I run Arduino 1.0 as 'super user', the Serial Port menu item can be selected and works just fine. Does someone know how to achieve the same thing in a non-superuser account? I can't remember if I did anything special when I installed version 0022 way back then... Thanks!