I am animating comps in After Effects CS6, and I'm quickly moving objects across the screen using positioning keyframes and changing size using scaling keyframes. Most of the time it works great; but sometimes the motion blur effect keeps appearing *after* the object has stopped moving. Not just for a second -- but forever. It appears correct when scrubbing on the timeline, but when I render the final output movie, a non-moving object sometimes has motion blur all over it.
Sometimes I can fix it by un-parenting some layers inside the comp... other times it doesn't fix it. Sometimes I just delete it and start over and it works. Seems more like a bug then something I'm doing wrong, but this is driving me crazy and is really slowing my work down, so I was hoping somebody else had come across this and knows how to fix -- or if it's a bug, if somebody knows if and when an update is coming out that would be fantastic!
I can't find any reference of anybody else having this issue on the Adobe forums or through Google searches... I also tried on my Mac Pro tower and Macbook Pro laptop in case it was a graphics card issue; it isn't, the exact same problem manifests itself in both areas. I did just discover that turning continuous raster OFF does seem to fix the problem--but then my vector images are blurry when I zoom in... and that again sounds more like a bug, not like an incorrect setting.
I tried calling Adobe, but they told me to post here. So here I am 
Also, this might be helpful... here is a screen capture of what I'm talking about... I have this character, and she was on the right side of the screen. I just moved her position from right to left with motion blur enabled... and it looks perfect on the timeline, but then when I render the video, it looks like this when she stops moving. And not just for a second... I haven't animated her any further and she's just like this for the rest of the entire movie; the effect never goes away.
Thanks in advance,
Sean