I am not able to print or view postscript documents. In both cases, it has been displayed (or printed) a message like this: Error: /invalidfont in findfont Operand stack: F0 Times-Roman Font Times-Roman 14740 Times-Roman --nostringval I tried to uninstall and install gs (and gs-aladdin) and related packages but I did not fix the problem. Does somebody have a sugestion to this? Thanks.