Hi, do you have any clue what this fatal error means (similar also outside gdb): (/usr/local/texlive/2007/texmf-dist/tex/latex/microtype/microtype.sty (/usr/local/texlive/2007/texmf-dist/tex/latex/graphics/keyval.sty) (/usr/local/texlive/2007/texmf-dist/tex/latex/microtype/microtype.cfg/usr/local/texlive/2007/bin/x86_64-linux/pdflatex: relocation error: /usr/local/texlive/2007/bin/x86_64-linux/pdflatex: symbol regexec, version GLIBC_2.3.4 not defined in file libc.so.6 with link time reference Program exited with code 0177. (gdb) Regards, Hartmut