I think it is a little yellow. Applying a quick autolevels (in PSP) gives this:
White balance errors are very common - just about all cameras get it wrong on occasions - and are one very good reason for having a copy of Photoshop Elements, Paintshop Pro or similar available, as the correction is usually very easy to do.
The original version of the girl's white sweater doesn't look so white up against the corrected version (its highlights actually have a colour code of R248 G236 B212 (#F8ECD4) - quite a long way off white).
fenlander