http://jflex.de/history.html
the meaning of the dot (".") metacharacter has been changed from [^\n] to [^\n\r\u000B\u000C\u0085\u2028\u2029]. Use the new --legacydot option to cause "." to be interpreted as [^\n].

we will eventually get to dot, but we're not ready yet
I will file a RFE for that