Why, in Yahoo! Maps is the "browse by category" frame is blank.?

I have a problem on my Vista Ultimate x64 when using Yahoo! Maps. The frame on the left side that lets you find nearby businesses by browsing categories is always blank. Is there some ant-malware program, like Norton, on my PC that is blocking that feature? I had a problem with my web based comcast.net email that was caused by Norton Adware blocker and fixed by disabling that, so, I wonder if there is something similar going on here.

I've taken a different approach with this one, having decided to tell a story without worrying about the beginning or the end. I'm not concerned with style or with structure, I just want to tell a story. I don't even care if its interesting, I just want to cover a certain sequence of events that I've invented.