unstatic edges

[ssjkakaroto]

hi there, i'm trying to encode some anime using avs 2.5 + xvid, the quality looks ok to me but there seems to be some problem with the edges, for some reason they seem to be moving when they should be still, i've uploaded a sample here:
ftp://johnbl.dyndns.org/pub/sample.avi
look at the guy's eyes and eyebrows

here's my script:
#
loadplugin("D:\AudioVideo\avs25\MPEG2Dec3_094.dll")
loadplugin("D:\AudioVideo\avs25\Decomb.dll")
loadplugin("D:\AudioVideo\avs25\Convolution3DYV12.dll")
loadplugin("D:\AudioVideo\avs25\WarpSharp.dll")
loadplugin("D:\AudioVideo\avs25\vobsub.dll")
#
mpeg2source("D:\vobs\ep1\ep1.d2v")
#
Telecide().Decimate(5)
#
crop(14,7,692,473)
#
convolution3d(preset="animeLQ")
#
WarpSharp(50,50)
#
BicubicResize(640,480,0,0.75)
#
VobSub("D:\vobs\ep1\subs\VTS_01_0")

i used the latest virtualdubmod and my xvid setting were:
MSP: 6
QT: MPEG
FCC: Xvid
Max IF: 240
Min IF: 5
CM: ON (everything else unchecked)
Max BF: 1
BF QR: 200
BF QO: 100 (everything else unchecked)
Min I&P Q: 2
Max I&P Q: 31
IF Boost: 0
Below IF Dist: 10
IF BR Red: 20
Curve Comp: 0 (high and low)
BR PD: 250
PB with Bias
Alt Curve: OFF

does any1 know what could be the cause of that?

tia