About a year ago there were several threads on a Mega8 flaw whereby Vcc & AVcc were connected internally; only a few ohms between them.
Now that the Mega48 & 88 are here, I was curious as to the "separation" of the supply lines.
ATMega48V-10AI (QFP) has 5.2 MOhms between the pins.
I don't have any Mega88s or other flavours of Mega48 to check them out. Maybe someone could do a quick check on a production Mega88 and report?