IPhone Keynote – present to Apple TV

Staying with the keynote format, no. I you export to a QuickTime movie, you will have the best chance to preserve the slide deck as it was on the Mac when saving it alone doesn't work.

You can only work around this by getting the mac pixels on the iPad since this appears to be an inherent limitation of the iOS app as written today.

Have you tried using Air Display to add the iPad as a second monitor and tell Keynote to present on the iPad? The company does awesome work and like any screen sharing over a network, there is latency and/or slight rendering artifacts, but it's better than other apps in that space as any I've seen.

Unfortunately, Keynote and Powerpoint do not talk to each other all that well. A lot of formatting issues have been known to occur.

If you're wanting to view/edit/present the presentation on your iPad, I would suggest using Keynote on your Mac and Keynote on your iPad. If you're wanting to stay as compatible with a Windows environment as possible, I would suggest using QuickOffice HD on the iPad and Microsoft Office for Mac 2011.

Hope this helps.