Ads move when mouse-wheel roll over them in FF

Any known way to stop this?

[GranoSalis]

I've noticed this on a number of pages, unfortunately including mine!
In FF and Netscape (not IE or Opera), when you roll your mouse wheel when the mouse is positioned over an ad, the ad block itself moves up/down rather than the page. This happens with ad blocks, link thingos and referral buttons.
Is there a known way to stop this? I know it doesn't happen on some sites.

[netscan]

Sounds like it's in a table smaller than the ad block

[jomaxx]

I use Netscape and see it on my own site (banner size blocks). You can only scroll a pixel or two. IMO it's just a tiny glitch and not likely to be noticed by anyone.

[GranoSalis]

Ok, I'll just have to hope that nobody does! :-)

[Gruntled]

I've noticed it and it on several sites and find it very annoying.

[MyGen]

It's because the advert is displayed in an IFRAME block, and some advertisers use slightly longer descriptions, causing the block to scroll, nothing you can do about it really, except in your mouse driver properties, you may have an option to set only the focused window to allow scroll, rather than whatever the cursor is over. Not a solution for your viewers, but it'll stop you being annoyed :P