the writeconfig thing affects all the drivers using slots, so possibly also c64, ibm pcs, iq151 and another dozen of system... hence, yes, even snes would have the same problem. but you are lucky and the bug is going to be fixed by judge very soon
concerning snes, the new implementation will be added initially as a separate driver (snesnew/snesnewp) until new gfx glitches are sorted out...
