Duplicated Style not Appearing for Selection

Problem

I have duplicated a style and made some modifications to the new style. I saved it and it appears to be fine. However, when I try to use the style in my topic text window, it does not appear in the drop-down list box.

Reason

When you duplicate a style, the style name under the Style Definition tab remains the same as that of the style you have duplicated. It is only the Description on the General tab that gets changed automatically (ie. it becomes "Copy of StyleName"). You'll find there is actually two "StyleName"'s listed when selecting the available styles from the dropdown box.

Solution

Rename the duplicated style under the Style Definition tab.