sorry, something wrong with my recent sign message- can't verify.
I think this is ok:
-----BEGIN BITCOIN SIGNED MESSAGE-----
Hello, I am zazarb of bitcointalk.org,
Tuesday 1 Sep 2015
-----BEGIN SIGNATURE-----
13onqzPnGzazarbReooW4sBkqEgKPoMwZV
HJCKMjUh7VPSdIgoBSfsiNhId9WoBSkGsnQ8T9RR4WNmKbxvcPXyncEuOBgcRcUY/RSJrLdwYv2ggUO9fLQcCmo=
-----END BITCOIN SIGNED MESSAGE-----
I checked also in brainwallet (offline ) but it failed to verify! Here is the pic too:

unbelievable

first time I post message without checking, but second time I checked with core client and in
https://chainquery.com/,
and all was fine, but now failed me to.
so third time

-----BEGIN BITCOIN SIGNED MESSAGE-----
Hello, I am zazarb of bitcointalk.org,
Tuesday 1 Sep 2015(third test)
-----BEGIN SIGNATURE-----
13onqzPnGzazarbReooW4sBkqEgKPoMwZV
HGM+u8jCnXk5jDl3/g7Qyryxo6ApPrQ9BhnQIAlrrUHMR0FqyxgjCOsHahOLXvzwzwYd46wEq1TNxTn1Ndb8PlM=
-----END BITCOIN SIGNED MESSAGE-----
check again:
https://chainquery.com/bitcoin-api/verifymessage{
"result": true,
"error": null,
"id": null
}