Recently my MacBook Air (1st generation, running 10.6.2) has refused to show Keynote presentations that worked fine a while ago. Keynote 09 (5.3) from retail iWork 09 package.
The problem is that with some presentations, it simply cuts some text from some slides, or replaces a text box with one that I can't change and that is only one character wide (and very tall). Some bullets disappear, and clicking to advance to them just goes to the next slide.
Interestingly, the thumbnails on the left are correct, and have all of the slides' content. The editing window is defective, though, as are some of the presented slides.
Another presentation just crashes Keynote when opening: the crash message says it occurred while in "SFWordProcessing.framework plugin" or something similar. Again, this is a presentation that ran fine a couple of months ago.
I have tried removing all Keynote Application and support files and re-installing, and that has no effect.
As far as I can recall, I haven't made any significant software changes on this machine since a presentation where everything worked fine. And the presentations themselves work fine on other machines, including a MacPro (where I edit them) and a colleague's MacBook Pro.
Any ideas? I desperately need this machine to work for regular teaching use....