System Information
I7-4770K 3.5GHz, 16G RAM, Windows8.1 x64, GTX760 (2x non SLI).
I7-920 2.67GHz, 12G RAM, Windows7 Pro, GTX460

Blender Version
2.73 b4d8fb5
Worked: (optional)

Short description of error

Exact steps for others to reproduce the error
This may just be "the way Blender works" so please consider this a feature request if that's the case.
Select at least 2 objects
Group them
Select group in outliner
Translation in viewport correctly affects the "parent" group node (as if the "Group" is in fact a "node" that has a separate matrix associated with it).
However, entering a translation in the properties panel only affects the "active" object - not the parent group node as one would expect based on the viewport behavior.