LDM login screen looks strange since Edubuntu 14.04

[X-Dimension]

Hi!

The LDM login screen shows a strange behaviour since the update to 
Edubuntu 14.04.
After the client has started the LDM login field jumps from the bottom 
to the middle and when you
click on "login" it jumps from the middle to the left and then back to 
the middle before it loads
the desktop.
Is this a bug or a feature? It looks very strange.