The Oxford English Dictionary records casted as being used as the past tense of cast from the Middle English period to the sixteenth century. The latest citation showing its use is dated 1526. If it is making a comeback, I haven’t heard or seen it, but that may be because it is not widespread in contemporary British English. The British National Corpus has only one record for casted, and that is in the theatrical sense. The Corpus of Contemporary American English, on the other hand, has 24 records.