I've not seen it before - So I am guessing its Access 2003 upgrade... Probably on the forms properties there is a help option (other tab perhaps). Or might be on the normal details, either way you'd need to set it to "no".
In vb6 there was an option for the control box to have buttons enabled/disabled, and one was the help button. This may be a new 'helpful' functionality which won't be helpful once you've coded your db completely different to Access normal uses - ie you make a proper db lol.