In the "long shot", Penny dives headfirst into the lake, getting thoroughly drenched, but in the nearly immediate "medium shot", she has dry hair, hat, and face as she swims to shore.
In the gymnasium, Penny's hair ribbon changes when her father comes in.
No Hungarian, certainly no educated count, would say "Oi, Budapest, yah".
In a scene in his rooms, the telephone continues to ring after Ray Milland picks up the handset.