I'd go w/ the water/dehydration idea as well - after moving to TX (and not getting things out of the car fast enough once I got there in July) my Addicted Philip got those same markings on its leaves. Most spots just stayed like that, a little sunken, but some turned clearish or brown. No leaves were lost though, the worst areas just seemed to section themselves off from the rest of the leaf and that was that. If there was some sort of short term event, like one/a couple day w/o enough shading, then the plant should be fine. Short term, the roots aren't likely to be damaged, but if the grower can't think of one specific event that may have dehydrated the plant, then Leo's suggestion about the roots is the next place to look!