You might check some of your SU settings. The 2Gb of ram should do nothing but improve your situation.
How are you erasing lines? Using the erase tool, the eraser, the delete key after highlighting or using Undo?
Do you have the same settings in the Preferences:Drawing:Clickstyle are the same as what you are used to? The program can seem very odd if you have settings here that differ from what you are "used" to. Personally I go for the click drag click approach. If you are in the midst of drawing using the "continue line drawing" checkbox it will want to keep on with the line tool until you change tools manually (in my experience which is why I don't use it) as the program just sees you as being between two endpoints after each click.
As for the printing. When you print, is the whole of what you want to print visible on the screen? The way SU works is it prints what is within the bounds of the window, not the entirety of the model or model space.
When you say SU doesn't play well with Firefox or Opera, what do you mean? I almost always have Safari and FF running while I am also running SU, Vectorworks, Graphic Converter, Edrawings and so on with no ill effects.
Looking forward to your responses. All the best.
Karl
