The following described problems are probably partly related to QTBUG-14935 which was fixed for Qt 4.7.2 (regression?):

A simple double validator like this

QDoubleValidator(0., 999., 0, NULL)

• returns "intermediate" instead of "invalid" for "121234"
• returns "intermediate" instead of "invalid" for "12.1234" for german locale
• returns "intermediate" instead of "invalid" for "12,1234" for C-locale

See the attached example for more info.