What are some examples of reversible errors?

A reversible error is any error that a judge makes in
applying the law to a given case.  It is not an error that the jury makes in coming to
the "wrong" decision in a case.

There are many possible
examples of reversible errors.  For example, a judge may allow a piece of evidence to be
admitted when that evidence was obtained illegally.  In such a case, an appellate court
could reverse the decision on the basis of that error.  As another example, a judge
might allow the sexual history of a rape victime to be brought up in a trial in
violation of a rape shield law.  Because this testimony should not have been allowed,
this would be a reversible error.

Essentially any error in
the application of law that could have a major impact on the jury's decision can be a
reversible error.