This is an invoice with Calibri font size 11. The cause of this is a user pasting data into a field with the 0x0 character in it.
A character like this will also cause xml-exports to fail.
Change the font to Arial and the invoice prints perfectly.
FM should catch pasting and importing of these characters as ordinary user will just freeze up when they see this. The character can be seen in the FM field als an invisible double space.
Took me several hours to find the cause of this issue.
Joost Miltenburg, The Netherlands