In 1.0.6 all Objects (rectangles, circles, lines and arrows) are drawn blurred, when using an uneven px width. For example we are always using 3px and no shadow. Because 0.8 Screenshots do not fit together with newer ones, we unfortunately have to keep on using v0.8.
I attached a screenshot which shows the difference between 0.8 and 1.0.6.
Blurring should be a user option.