gentoo1.1a fails from stage 1

[enesideme]

when trying to install gentoo1.1a from stage 1 I get the following error message:

"Unpacking rc-scripts-1.3.3.tar.bz2
sed: -e expression #I, char 76: indeterminated 'S' command
ERROR: the ebuild did not complete successfully
Function SRC_unpack, Line 2, Exitcode1
no error message"

Does someone know what it exactly means ? And what to do?

ps: no problem when installing from stage 3