Comment 5 for bug 771738

Patch tested and fix confirmed (no crash on load nor when exchanging objects connected with orthogonal connectors):

https://bugs.launchpad.net/inkscape/+bug/635469
  * drawing-1.svg
    select the red and green rectangle, open the 'Align&Distribute'
    dialog and click on the first of the three 'Exchange position'
    buttons in the 'Rearrange' section.
  * pwr mon conceptual flow.svg
    crash on load
  * Systems Diagram V2.svg.2011_06_04_22_49_26.0.svg
    crash on load

https://bugs.launchpad.net/inkscape/+bug/700298
  * Connector_crash_on_load.svg
    crash on load

https://bugs.launchpad.net/inkscape/+bug/705382
  * New document 1.2011_01_20_21_24_05.0.svg
    crash on load

https://bugs.launchpad.net/inkscape/+bug/716057
  * cc.svg
    crash on load

https://bugs.launchpad.net/inkscape/+bug/771738
  * this one

Note: patch not tested with new diagrams or other files for potential regressions.