Moving page under different parent breaks all relative file links

Zim version: 0.63
Gtk version: 2.24.27
pygtk version: 2.24.0
Occurs on both Ubuntu 15.04 and Windows 7

Description:
If a page contains relative links and is moved somewhere that changes its position in the hierarchy, the links break.
For example, let's say I have the following pages:
Project A
Project A Tasks

Project A Tasks contains the link [[../../somefolder/somefile.pdf]]. If I move Project A Tasks under Project A:
Project A
-->Project A Tasks
The link [[../../somefolder/somefile.pdf]] is not updated.
It should be updated to [[../../../somefolder/somefile.pdf]] to reflect the changes.