[Darksheare]

No there has not.
Ison is still on the orbit predicted.
There has been no magic change.
And there is no way for its orbit outward to intersect with ours.
It is above the plane of the ecliptic.
Ecliptic being our orbit.
On the swing around the sun, ison followed what was predicted.
The only surprise was the activity of the nucleus ceased.

Look up comet 96p/machholz.
For what bpearthwatch says to be true, comet macholz cannot exist.
Nor should encke or temple Tuttle.

[Yosemitest]

Did I currently say it would intersect us? No.
But I won't feel secure from the outbound debris until after the 1st of January, 2014.
The orbital path has been document as ~ no longer on schedule, or on path, ~ whether you acknowledge it or not.
However I do respect you opinion, and I still have much to learn about comets.

Like I said before, they interest me, and I believe Revelations.
Within the laws of physics, I want to understand the "HOW" .
It's been many years since I was in high school and mathematics was my strong suite, but I haven't reviewed any mathematics for many, many years.
I didn't get to take calculus in high school, because our math teacher got a better job teaching college level, after my junior year.
Oh well, so goes life.

What I don't understand is, what propels comets or any space body into the high speeds that most achieve, but I know that swings around other bodies is part of it, as well as collisions, and stellar explosions.

Don't take offense, just because I disagree (learning in progress).