Comment 25 for bug 932088

Ok, now I eyeballed few logs and tentative conclusion - thank you very much, turning off pipelining seem to have solved our issues! Not even those weird 403's don't pop up after 2012-04-04. If you're interested what it was here's example:

2012-04-04-slave-i-a5a153c2.log:W: Failed to fetch http://us-east-1.ec2.archive.ubuntu.com.s3.amazonaws.com/ubuntu/dists/natty-updates/universe/source/Sources 403 Forbidden
2012-04-04-slave-i-a5a153c2.log:W: Failed to fetch http://us-east-1.ec2.archive.ubuntu.com.s3.amazonaws.com/ubuntu/dists/natty-updates/main/binary-amd64/Packages 403 Forbidden
2012-04-04-slave-i-a5a153c2.log:W: Failed to fetch http://us-east-1.ec2.archive.ubuntu.com.s3.amazonaws.com/ubuntu/dists/natty-updates/universe/binary-amd64/Packages 403 Forbidden

All this applies to android-build.linaro.org so far, I'll check ci.linaro.org state later.