ID 225514 - Importing nodes with a backdrop causes the nodes to change position

Problem summary
When exporting and reimporting a series of nodes with a back drop in the graph editor. The nodes inside the backdrop will change position on import with respect to the backdrop and each other. Please see images below for illustration.

Example 1) Copying a series of nodes

Example 2) Importing the series of nodes

Customer reported version

3.0v3

Customer reported platform
Linux Scientific Release 6.4 (Carbon) 

Steps to reproduce

1) Create a series of nodes connected to each other.

2) Create a backdrop

3) Select the backdrop and export the contents as a .mng

4) Re import > Observe differences

Reproduced by support
Repro'd by Support
3.1v1 3.0v3 3.0v2 Windows 7 and Linux CENTOS 6.2

Expected behaviour
For the nodes to remain in the same position

Actual behaviour
Either the backdrop or the series of nodes has moved