#expected result:
The circle could trace the cloud shape as it transitions.
#Actual result:
The circle can't trace the cloud shape as it transitions.

#platforms have the same issue:
win xp sp3
win vista
mac

#Steps to reproduce:
1)Open the ainimation/manual/mob1238.fx.
2)Verify the test case whether it is same as the Reference image.
3)Verify the circle whether the cloud shape as it transitions.

You will notice thise issue.