when i make lines in the svn version, my lines are sharp, not line uniform, why is this ?
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You are using the development build, right? I suspect when you drew the shape with you had "Ellipse" selected from the "Shape" dropdown list on the tool control bar.

I don't know how to remove that effect after you've already created the object. Perhaps someone else does? In any case, you can simply re-draw the object but make sure you have the shape selection set to "none".

It's just an lpe, so if you get the lpe dialog up with that object selected it will be in the list, and you can select it and remove.