Thanks Carl, I guess the real question is, should I feel the need to drain the pool, fix the slight 'oval' shape, then re-install the liner and re-fill the pool just because of this? I mean, what sort of problems would this cause assuming everything else is OK?

Don't get me wrong, if I need to fix it I will, but if it won't really hurt anything I'd probably hold off until next season.. I just really don't know.