Commented Unassigned: MaskedEditExtender's ClearMaskOnLostFocus does not work [27427]

Using as an example of starting the April 30 version 4.1.7.0429 version AjaxControlToolkitSampleSite.zip shifting the focus on the textbox the page is not erased the mask, the result is visible in the attached figure.
Comments: I'm having the same problem. MaskedEditExtender's ClearMaskOnLostFocus does not work.