Hi,May be height changes will affect.This code may help you
div.oddity-dropdownlist span{
min-height:19px;
}
div.oddity-dropdownlist button{
min-height:37px;
vertical-align:top;
}
or
div.oddity-dropdownlist span{
height:19px;
}
div.oddity-dropdownlist button{
height:37px;
vertical-align:top;
}