Open the (to be) attached bug doc. It contains a small form, with some controls
bound to the Bibliography/biblio table.
To the identifier control, there is a veto listener (in Basic) attached, which
denies all values which evaluate to a number greater 10 or less than 1.

When you enter an invalid value into this control, and leave it with the tab
key, then the value is (as expected) denied. *But*, the focus is still move to
another control! It's expected that in case a control value is vetoed, the focus
stays with the control itself.
Without this, you can now (after leaving the control and confirming the
validation message), still commit the record.

This bug makes veto listeners at controls useless.