--- Operating System, Graphics card ---
Windows 7 64 bits
Nvidia GeForce GT540M

--- Blender version with error, and version that worked ---
Blender 2.68a official and Rev.60515 on svn too


--- Short description of error ---
When you try a snap operation with edge selection mode, with an edge mark as active and snap mode to active too, snap isn´t performed as expected, no matter if you try to snap to own object or to another object in the scene.

If you try with vertex or face, it works with no problem.


--- Steps for others to reproduce the error (preferably based on attached .blend file) ---

Take the .blend file attached and try scale the selected circle ( note the location of the active edge ), While you scale the thing goes well, but when you reach some point of the cube above and snap visual feedback is telling you that snap is detected, see that entire selection goes to original location without performing the snap operation.

Change the selection mode to vertex and repeat the operation with any vertex selected as active, and see in this case it works, tested with face mode too.