Weird message in my apache error log

["Josep Serrano" <mylists@montblanc.homeip.net>]

Hello all. I got some weird entries in my apache error log.
Any clues about what/where/how ?

sh: -c: line 22: unexpected EOF while looking for matching ``'
sh: -c: line 24: syntax error: unexpected end of file

sh: -c: line 0: unexpected EOF while looking for matching `"'
sh: -c: line 1: syntax error: unexpected end of file

Thanks,
Josep SERRANO.