Overlapping lines appearing thicker

[Jens Jacobsen]

Hi all,

I use OG since a while and still experience a problem when connecting
multiple lines to a shape. I did post this issue a few weeks ago but
unfortunately nobody could help me back then...

When I draw lines from one shape to some others, the line appears thicker
where the lines overlap. (I have a picture & the .graffle-file on
http://www.jjac.de/insider/OGlines.html)

All the lines connect to the single one magnet to the left of the top shape,
and all have the same properties, so this should not be the problem?! The
lines are exactly connected to the same point, which I can see when I zoom
in to 800%. And, surprisingly, there is just one single line with an even
stroke at that zoom level. But as soon as I zoom out to 200 % or less the
lines appear thicker again - and in exported tiffs this is visible also.

Drawed with OG Pro 3.0.2 (v57.2). This is most apparent when I use shadows
on the lines, but is visible without shadow, too.

I found that OmniGraffle 2 shows the same behavior.

Any hint for avoiding this is greatly appreciated!

-Jens