Steps to reproduce

1. create a textbox with a constraint like http://zkfiddle.org/sample/21ot8fe/2-errorbox
2. trigger an error box
3. click on the border of the X, it fades out.
4. trigger an error box again
5. click the X itself

result

it disappears instantly.

expected result

in Step 3 and step5, the error box shall disappear in the same way. Whatever which way is used.