keynote file can not be opened because it is not a valid Keynote document
When opening a, just saved, existing file from my own computer it will not open.
I generetatd the file previously by
duplicatingan existing fil, changing it, renaming it and then replacing it.
I use a Mac Book Po
OSX 10.8.2 Keynote iWork '09
processor 2.66.Ghz intel Core i7
Keynote iWork '09-OTHER, OS X Mountain Lion (10.8.2), Mac Book Po OSX 10.8.2 Keynote iW