Slight jerkiness when ItemDetail is displayed


I have completed the regular exercise of ch 15 and everything is nicely saved (text and images) persistently in the fsys.
Great chapter, btw.

There’s one behavior which I cannot figure why: after the ItemDetail is saved (with image) and when it is called upon from the ItemList and re-displayed, there is a somewhat jerkiness when the animation is re-displaying the ItemDetail.
This only occur when the ItemDetail has an image associated with it.
Is anyone seeing this behavior?

I have checked that my iPhone4S is not running anything else except this Homepwner app. I am also running the latest Xcode and the latest SDK (not beta).

Any idea(s) why this is so?