Text Wrap in InDesign
It can be very quick and easy to base a text wrap on the edges of a placed graphic. But one downside of this method is that when someone edits the graphic, even just tweaking the color a little, your text wrap may unexpectedly change.
To prevent this, select one of the text wrap points with the Direct Selection tool and nudge it just a tiny bit. Your text wrap won’t change, but the Contour Options Type in the Text Wrap panel will now be User-Modified Path, and it will not change if someone changes the graphic.
-Mike Rankin, InDesign magazine via Design Tools Monthly