Oh, last time I checked, it didn't. I'm about to sign a message from 15SDkNhpqVsJmzrBnvWtGJSs4jwWmv6v19, the wallet I used to first apply for the Secondstrade Signature Campaign. I will edit this post to insert my message.

EDIT: Here it is:
-----BEGIN BITCOIN SIGNED MESSAGE-----
This is MagicIsMe from Bitcointalk.org and my account is not hacked. It belongs to me and me ALONE.  My password change is intended and was not due to any intrusions. As further proof, this message is to be posted at https://bitcointalk.org/index.php?topic=1206112.msg15041633#msg15041633
-----BEGIN SIGNATURE-----
15SDkNhpqVsJmzrBnvWtGJSs4jwWmv6v19
H+KIOHIdjjzURDw8D5zevh2gqaBNBM4biASaheyalWCIElP90QThG3qMelq2lFQf4bfCePaX7DV94Ve4ADbWLMM=
-----END BITCOIN SIGNED MESSAGE-----