Red diamond bullet This usually means that the wrong font is being used.

There are a number of reasons why this might be. You could try checking whether:

EscapeE 'eE' iconEscapeE has been configured to ignore fonts: see Optimizing the configuration.
A font substitution has been requested: see Font tables.
The font would have been resident on the target printer but EscapeE does not have it: see To display resident fonts table.
There was a problem in reading a download font: see Handling fonts.