Ok, I do have a mega2560 board [although only used a couple of times], and I tested
lefty's sketch. It works the same as on the 1284 chip. For arraysize = 4000, it uploads
and runs, but at arraysize = 7000, it uploads and verifies ok, but the sketch doesn't run.
And I am using Enhanced IDE ERW v.1.03 here, so the toolchain fix doesn't seem to have
gotten over into the latest version here either.
And yet another problem. With ERW 1.03, starting Serial Monitor does NOT send a reset
to the mega2560 board. I have to reset manually. Sheesh.
Ok, I went back to test Serial Monitor on both IDE 1.0 and 1.03, and they both send a
reset to the atmega2560 board when you open Serial Monitor. So, triple sheesh - it's
aways something around this place!