Looks like the black bar was printed on top of the security thread (remember, the thread is part of the paper before it gets printed, so there's no way the thread could be on top of the black bar).
I wouldn't think much of it.
Logged
BWJM, F.O.N.A.
Life Member of CPMS, RCNA, ONA, ANA, IBNS, WCS.
President, IBNS Ontario Chapter.
Treasurer, Waterloo Coin Society.
Show Chair, Cambridge Coin Show.
Fellow of the Ontario Numismatic Association.