I'd suggest people try using Firefox (www.getfirefox.com) and then in the add-ons you can browse for an advert blocker.
I personally don't allow Flash to run on all my PCs. Only one has it installed (and there's an add-on for Firefox which blocks Flash from running, unless you click on it - just displays a letter "F" to show where something is blocked).
I have today been using a friend's PC and finally (after weeks of seeing complaints) seen the annoying advert. Can understand that MN would not be in a very clear position to turn down ads, but perhaps MNHQ can give CBeebies "feedback" in the strongest terms that many users of the website have complained because they find this "animated" advert far more annoying than any other...
At least give some feedback that allows CBeebies to know it was seen but hated by many. Other websites have sometimes acted to remove such "animated" ads, when complaints are received, but the last time I saw a response from MNHQ was that it was "cute" and "only on for a month".
Well, however "cute", if it annoys readers, they will act to block not just that advert, but ALL adverts (eg placing ads1.mumsnet.com in a "blocked sites" list, so nothing from there will display, if they are tech savvy).
Lol at the techy explanation followed by the low tech post it stuck on the screen.
I agree with Webdude actually. It is not a very effective ad if posters are installing ad blockers to avoid seeing it. I am considering doing that as there are more and more animated ads and I find them really distracting.
"more and more animated ads" another reason for me is that I don't like "noisy" ads.
I often have internet radio playing, so find some nasty advert noise on top to be a pain, but at other times, for example, 3am, it is a more unpleasant annoyance if sound comes out at full blast, potentially annoyingwaking the neighbours (yes, I have some big speakers and do sometimes 'crank it up') or others in the house.