Advertising covering reply text box

[Calaber]

I've just placed a reply to a thread, which had to be shortened because a "rolling"Woolworths ad covered the latter part of the text box. There was no way I could see of getting rid of the ad, nor could I work out how to move it out of the way.

Any clues how to rid oneself of this rubbish? I have adblocker installed but it failed with this one.