I recently upgraded to the TeX Live 2010 and i see that my documents fails to compile in the case that i have something like \author{\href{mailto:some_mail@mail.com}}{Christos Stamatopoulos}} returning ! Undefined control sequence. \@author ->\href Everything was fine before the upgrade so i am wondering what is going on. Reproducible: Always Steps to Reproduce: 1.Upgrade to TeX Live 2010 2.Create that document with \maketitle and autorh with \href 3.compile Actual Results: compilation fails Expected Results: should compile fine as it happened with the 2009 version
Please mark this as invalid as i found what the problem was in the end, after enabling and disabling everything in the preamble.