Comment 5 for bug 400383

@David:
Just realized, your screen shot is *not* using FUSA, Its using User-Switch-Applet.
The GDM is broken in Karmic , and that seems to caused this temporary switch.

While your assessment is correct that the separator is odd.Just to show how the separator could be better if it was smaller, I have attached a screen shot of New Wave theme which uses its own separate vertical and horizontal lines.[Not the best comparison, since this is a dark panel]

Notice the subtle hint of the separator, is better than removing the separator totally.