CFTO HD 9.1 from Toronto?. Its been there for over 5 years now!. Glad that you just noticed anyways, lol. just kidding. the fact that you lost the signal does not necessarilly mean that it is gone for the rest of us enjoying free OTA HD TV. Try moving or relocating your antenna as needed. if you give us more details of your antena setup we will gladly help you further. here you will find a list of all available channels for the GTA.
[Link: remotecentral.com]. tipically you should get also Global , CBC, OMNI 1 and 2 , Sun TV and City TV all in digital format and almost all with HD programming almost all day nowadays.