I think the problem are the blank spaces (or tabs) before </setCheckbox>
I tried <setCheckbox checked="false" description="check it" name="checkbox"></setCheckbox> and the problem does not happen
It seems that there are problems also with <setInputField>:
<setInputField value="value" description="desc" name="field">
then the form is filled with the value "value " insetead of "value"
<setInputField value="value" description="desc" name="field"></setInputField>
I think we should just document this behaviour. We could apply .trim() on the inner text but that would make it difficult to put in multiline textarea's.
Documented since R_1513.
Reopen to change fix version
Set fix version to 2.5