I do some heavy computing, and need to output many 
pages each time. But sometimes these pages are empty.
They don't contain numbers, but formula like this: 

=if(someSheet.A5 <> 0; someSheet.A5; ""). 

I don't want to output any pages that contain no 
numbers, so I choose File->Print, then select
options and check "Supress output of empty pages". 
But this doesn't work -- pages that don't contain
numbers still print. 

To work around this I have to copy all the data
to another sheet (PasteSpecial->...) whithout
fomulas. Then "Supress output of empty pages" 
works as expected. 

I would suggest not to print pages that don't 
contain printable characters.