date format not verified in "Search Account Entry Line" popup window

In the popup window entitled "Search Account Entry Line" which is activated for example when importing invoices in "Financial Management->Entries Encoding->Entries by Statement->Draft Statements" then click on a statement date to open the statement, then click on the "Import Invoices" button, enter a date and click the button "Go" then click on the "+" button to get the popup window.
In the effective date enter a date in a wrong format e.g. "10)02/2009" (typo with the parantheses instead of a slash) for the first and "10/02/2009". Then click "Filter" and the result will be the entire list without any error indication on the date format.
If you make a similar error on the date just after the "Import Invoices" action, you get an error window with the message that the date is incorrect, which is the correct behavior.