When we print one of the output PDF created from GS9.01 we get Font printed with squares. Here ghostScript9.01 doesn't produce any error or warning. If we print the same title created from GS8.71 the square issue doesn't happen. However, GS8.71 produce the following error or warning on that PDF. GPL Ghostscript 8.71: Failed to interpret TT instructions for glyph index 12 of font FBAIEI+BellMTBold. Continue ignoring instructions of the font. GPL Ghostscript 8.71: Failed to interpret TT instructions for glyph index 18 of font FBAINL+BellMTBold. Continue ignoring instructions of the font. GPL Ghostscript 8.71: Failed to interpret TT instructions for glyph index 33 of font FBAJFM+BellMTBold. Continue ignoring instructions of the font. GPL Ghostscript 8.71: Failed to interpret TT instructions for glyph index 30 of font FBAJNP+BellMTBold. Continue ignoring instructions of the font. We want either GS9.01 to give the same error or GS9.01 should successfully generate the output without any print issue.
Without a test file to illustrate the problem, there's not a lot we can do to help. Please supply a PDF which illustrates the problem. This is more than likely a change in the font code than the PDF writing code, so I will look into it first. FWIW, the squares are very probably Truetype notdef glyphs, so the 9.xx output may well be *strictly* correct - but I realise it is not likely as intended.
This may have been fixed by: http://bugs.ghostscript.com/show_bug.cgi?id=692310 But without a test job, it's impossible to tell. With no test job forthcoming, I'm closing this bug.