Curve segments with arrow ends have their nodes inside of the arrowtriangle while line segments have them at the tip of thearrow. Converting a line segment into a curve segment will thusrearrange the segment erroneously.
Gregor,
this is the workaround I also use in some graphics. It helps a lot to define round tips for the line ends. But it is still a workaround and will not always lead to useful results. A better solution would be to change the behavior in the software upfront.
Markus
By the way: Servus aus Linz!
Corel Draw X5 trial version: The problem still exists!