apt-get sources.list

[marhleet]

apt 0.6.46.4 for linux
with apt-get updated and upgraded and fixed and dist-upgraded

the sources list has the unofficial.debian files at
ftp://ftp......
which always errors
is it okay to just change them to
http://ftp.... which works just fine
or is it just a weekend thing with some computer ftp access missing on weekends ....