Humour Denied

The company I work for just merged with another firm, so all our computer systems are different now. They just changed over the networks last week. I got blocked for the first time ever today, and this is what the "blocking" window said:

Access Denied

The web resource http://www.giantitp.com/comics/oots0602.html has been deemed by your administrator to be unsafe or unsuitable for you to access. The resource has been blocked. No further action is required.

Reason: The category of Humour has been blocked by your System Administrator