I\'m getting the following error when I try and generate a PDF using the mPDF class:
TTF file \"C:/wamp/www/inc/mpdf/ttfonts/verdana.ttf\": invalid checksum
No need to show errors on the screen. See all errors and warnings in log file like "error.log" of your php + apache(?) server. It help you to find and resolve the problem based on message in the log file.
I any case you should use recommend fonts - see mPDF manual.
Probably, you need to convert TrueType fonts into proper MPDF's format. (http://mpdf1.com/manual/index.php?tid=409&searchstring=fonts)