I'm using a small UIWebView, and scalesPageToFit doesn't work correctly for some url.  (look like it cannot resize at 100%. (but if i zoom out the webview manually(gesture), it work!
view = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 200.0f, 400.0f)];
webViewT = [[UIWebView alloc] initWithFrame:view.bounds];
webViewT.delegate = self;
webViewT.scalesPageToFit = YES;
NSURL* url = [NSURL URLWithString:@"http://www.google.com/"];
[webViewT loadRequest:[NSURLRequest requestWithURL:url]];
Please note that i've found a solution:(below work, BUT I have the time to see a "resize"
- (void) webViewDidFinishLoad:(UIWebView *)webViewT {  
    if ([theWebView respondsToSelector:@selector(scrollView)])
    {
        UIScrollView *scroll=[theWebView scrollView];
        float zoom=theWebView.bounds.size.width/scroll.contentSize.width;
        [scroll setZoomScale:zoom animated:NO];
    }
}
Any idea? Thanks!