Whoa...it won't paste. Well for me between id and 27 in that line I have a smiley face graphic....odd. Do you see it in the MR forum or is just in my browser?
If you didn't put it there, then someone else has access to your web files!
Do you use FTP to upload your files? If so, it is important to know that FTP is sent in "plain-text", so anyone on the same network that you are can very easily "sniff" your FTP info.
I would definitely change your FTP password and ask for a FTP log from your host (times and dates of FTP logins/login attempts)
Yea, empty links hiding at the bottom of pages is definitely a red flag, and Google can spot these and very possibly is what caused the email to the OP. It's too bad Google's emails are never more helpful as it's their software that makes the detection.