Hi I have a question... suppose I place the same 250x250 ad code twice in the sidebar.. is this aginst the adsense terms ? I searched on adsense forum about this, but couldn't get a clear answer.. thanks.
you mean you put the same ads in sidebar? I think its OK I usually do that and I see that they didn't show different ads.
In fact i am using the same code thrice on one page and there is no problem at all for that IMO. DON.
I have sites that use the same code three times on the same page, but only because their placement is so similar it doesn't make sense to track them using separate custom channels for each individual ad. I also have sites that use the same size and type of ads on teh same page, but they're different units because I use different custom channels to track them.