It seems that: [...] TL_CONF_BANNER=--with-tex-banner='"TeX Live 2010/RC1 on Cygwin"' ./Build [...] does not work any more. I find always someting like: This is pdfTeX, Version 3.1415926-1.40.11 (TeX Live 2010)... i.e. "TeX Live 2010" as banner! :( Any suggestion? Ciao, Angelo.