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I'm using Illustrator CS5 on OSX. I run into this strange behavior and I can't figure out why it happens (and stop it from happening).

This is what I do:

  1. Draw a rectangle
  2. Effect > Warp > Arc
  3. Set to -6
  4. OK
  5. Effect > Stylize > Round corners
  6. Set to 6px
  7. OK

Then, I take the corner (shift pressed) and resize the shape, making it smaller. Then at a certain point the shapes deforms.

Below a illustration of what happens:

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up vote 4 down vote accepted

Make sure you have Scale Stroke & Effects On. This will help scale any effects or styles you have placed on an object when changing the size of said object. Just Double-Click the Scale Tool and the box should be down below. Just check it and that should do it.

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just turn on 'scale corners' in the transform palette, done

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We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.

Can you please add in screenshot to show the menu and the effect? – Kurt Dec 22 '15 at 11:24

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