it looks like you removed the width attribute instead of editing it.
dont remove the width attribute, originally it was set to 100px:
.WA_SpryValidationTooltip_errorWrapper {
border-style: solid;
padding: 10px;
white-space: nowrap;
width: 100px;
}
my suggestion was to edit it:
.WA_SpryValidationTooltip_errorWrapper {
border-style: solid;
padding: 10px;
white-space: nowrap;
width: 120px;
}