PDFCreator doesn't print some fonts

I was using PDFCreator and was happy until version 0.99. After that the newer versions including the latest v1.20 doesn't print properly some of the fonts I use. They appear in the PDF as rectangles of different size. What could the problem be? I noticed that the new versions use Ghostscript 9.00 while v0.99 used Ghostscript 8.70 could that be the problem? If so, can I install v.1.20 with Ghostscript 8.70?