[alsien]

I don't know if it is a bug, but for sure it prevents me from doing what I need.

In OGpro I need to draw a type of arrow in which the arrow symbol is not at the start/end of the line, but in the middle.

So I did a customized arrow type by doing this:
1. draw a simple line
2. draw a triangle
3. connected the triangle at the center of the line
4. set the triangle's "Label orientation relative to the line" to "parallel"

Apparently, it works. But when the line's inclination is changed, the triangle flips 180 degrees. For instance:
- When the line goes from top-left to bottom-right, the custom arrow points to bottom-right.
- When the line is moved and goes from top-right to bottom-left, the custom arrow points to **top-right**.

Sounds complicated but you can verify it easily.

The only way I found to go around this is to manually flip the triangle. But when I have a graph with tenth of connecting lines, even a little modification requires to review the whole graph.

Any help, present (a better workaround) or future (a fix?), is welcome.

Thanks