Apple have recently released the Keynote 4.0.3 which is ready for download now, Keynote 4.0.3 will apparently address performance and stability issues when working with large documents.
If you want to download you must have Keynote 4.0.2 installed on your computer to install this new update.
System Requirements
• Mac OS X 10.4.10 or later
• Mac OS X 10.5 or later
• Keynote 4.0.2
Keynote 4.0.3 is available via Software Update and also as a standalone installer; the file size is 20.5MB which you download directly from here.
Source – Apple
