Scroll to top broken with Ads on iPhone

Question

The scroll-to-top feature (touching the status bar to scroll to the top of a UITableView) seems to be broken when Ads load in my app.

I did add the following in the viewDidLoad of my UITableViewControllers to try to solve the problem but it doesn't help:

[self.tableView setScrollsToTop:YES];
[[self.tableView window] makeKeyAndVisible];

After some experiments, it seems that I can scroll to top when I start the application, but I soon as an Ad appear (Mobclix), the scroll-to-top feature doesn't work anymore. I think this is due to some UIWebView used in the Ads (http://stackoverflow.com/questions/1361614/iphone-os-tap-status-bar-to-scroll-to-top-doesnt-work-after-remove-add-back) but I cannot really access that UIWebView.

Any suggestion to solve this problem?