upon reading this thread again, i think i know what your talking about.
the adapter is loose right? its like that with my phone charger and my E30.
heres what happened with me: one of the chargers from a previous phone came with a cheap plastic sleeve that fits around the adapter, it fills it out enough so that it fits without wobbling.
its just a cheap piece of plastic. if this is what is happening then let me know, and i will take pics of this sleeve.