A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
Wow! I have found the source of the problem. It is NOT related to the number of slides in the presentation. It is related to the page setup. For instance:
"PowerPoint - File - Page Setup - Size - Slide sized for - On-screen Show (4:3)" truncates page x of y
But
"PowerPoint - File - Page Setup - Size - Slide sized for - A4 Paper (210x297 mm)" NOT truncates page x of y
I have not tested other options, but it would be great if Microsoft cold fix this annoying bug. Thanks!