If a font is letterspaced by a sufficiently large amount, pdftex will
insert fake spaces between letters, which is obviously wrong:
\pdfcompresslevel0
\pdfinterwordspaceon
\letterspacefont\1\font 250
\1 AB
\bye
yields this:
Td [(A)]TJ/F52 9.9626 Tf( )Tj/F1 9.9626 Tf 9.962 0 Td [(B)]TJ
Bye,
--
Robert
