In the past, I had edited my hosts file so that I could access sites like youtube. I had also entered blogger.com (since it is another favourite target of censorship). Perhaps blogger had changed its ip address without informing yours truly. I commented out the blogger lines in my hosts file:
Then I opened a command window to check out the ip address of blogger:
As you can see, the ip address is not 188.8.131.52 anymore, it is 184.108.40.206. Mission accomplished.
Interesting note: I could reach blogger.com with UltraSurf. It means that UltraSurf bypasses hosts (besides hiding your ip address).