DO NOT FOLLOW ANY DIRECTIONS IN THE EMAIL.
You had me going for a second there..but no, this email arrived to the NEW address that I added AFTER the claim/reset page.
So either that got leaked, or it was indeed a password reset attempt.
It'd be nice if they'd put announcements on MtGox notifying users of this sort of thing.
They did say this more than a week ago "DO NOT DOWNLOAD ANYTHING
If you receive ANY email which seems coming from Mt.Gox asking you to download something (certificate, generating program, etc), DO NOT DOWNLOAD. Do not either input your password on any site which is not MTGOX.COM."