Aliasing in after effects

Hey! I am new with editing and need some help!
When I edit my video files in Premiere they look great. In fact, when I edit my video files in after effects, they look great too.
BUT
When I edit my files in Premiere, save as an Adobe Premiere Project and then import it into After Effects I get a problem.
At first it is horizontally squished. So I press the Toggle Pixel Aspect Ration button and the resolution seems correct, but
it has aliasing.
I have some screenshots.
Nice looking file in premiere:
http://www.antosiafiedur.com/prem.png
Aliased file in after effects
http://www.antosiafiedur.com/after.png
Please help!
I am using CS 5.5 and video from a Canon 5D Mark II (1080p)

Perfectly normal. AE has always behaved this way. If you wnat to get better quality, increase the pertinent pref setting/ hack the prefs file. Also your preview is not 100% zoom and 100% resolution. Furthermore things like footage interpretation for fields would matter. Nothing that would put any longtime AE user on alert. It just is that way.
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Aliasing in after effects

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