iframe ads not working correctly in vBSEO 3.5.2

I am using ads from Tradedoubler in my forum. In vBSEO 3.5.1 PL1 I used iframe code from them and in all versions before 3.5.1 PL1 and it worked just fine. However, in vBSEO 3.5.2 it does not work. The site reloads over and over again. When I replaced the iframe ad code with java script ad code it works just fine.

I am using the built in ad manager in vBulletin for this. vBSEO is the only "MOD" I am using in my forum.

I just tested this and it works correct on my sites. You need to make sure the iframe code you used is valid and has not been recently updated.

FYI, iframe has basically been deemed obsolete (not valid in xhtml strict) and should be avoided if at all possible.

It's very difficult to not see this as a bug because it has been working without any issues at all in earlier versions, but since the upgrade to vBSEO 3.5.2 it cause serious problems. I can choose between iframe or javascript. I guess javascript is better then?

Yes, javascript is always the better choice.