Is Shackling a Defendant with Leg Restraints During Trial OK?

In the United States, a criminal defendant is presumed to be innocent. There are many safeguards in place to protect this right, one of which is a general rule (subject to exceptions) that prior convictions are inadmissible.  What about having a defendant in court in leg restraints? Does this suggest he has a criminal disposition, undercutting a presumption of innocence?  Click on the following link to read how one court evaluated this issue.

http://www.greghillassociates.com/is-shackling-defendant-with-leg-restraints-during-trial-ok.html.