With config.xml modified it's ok (even if I logout i can't re-type my login : the 'm' character doesn't work).
The 3D covers are amazing !!!

I think ther's is a bug in sms core because when i play with aladdin the sprites are clipping and it seems that they haven't :

Here's is a video of the first level without clipping :
http://www.youtube.com/watch?v=9gF1huLaMYU

Ralf do you confirm this is a bug?

I found sprite clipping in sonic spinball intro too.

No I'm 95% sure it isn't a bug. The video you linked to is an emulator playing the game, not the real system. Most emulators don't emulate the machine correctly, and some have options to turn on/off the sprite flicker which is used in the video.

The real system flickers when 8 sprites are on the same line and the 9th sprite wants to be drawn. Since RetroCopy is deeply emulating the internals it is trying to be as close to the real thing as possible.

You're right Ralf :-)