Minor Description
The value "right" is one of the possible values and works correctly. It is part of the checkbox.ftl.
But in struts-tags.tld the description only mentions top and left.
Similarly the description in the annotation of setLabelposition of UIBean only mentions top and left. Checkbox is a subclass of UIBean.
I saw a few older issues dealing with labelposition and right originally being the default, so maybe this is side effect of fixing that issue long ago.