I randomly was trying a split today on a '*' field and got the following error:

System.StringException: Invalid regex: Dangling meta character '*' near index 0 * ^

Out of curiosity, I tried to split on '+' and got the same error.  

This is easily reproducible for me by running the following code in the execute anonymous window - can anyone else  confirm?

string sString = 'someStuff'; string[] splitted = sString.split('*');