cannot upgrade from 8.10 to 9.04

[rambentuvia]

I get a fail message with this text.
I am experiencing other issues that I think are related:
every 9.04 iso I try to download I get an incorrect md5sum (this happens when I download from various sites and on various machines with various operating systems (xp vista and ubuntu)

Anyone can help

Failed to fetch http://il.archive.ubuntu.com/ubuntu/pool/main/s/samba/smbclient_3.3.2-1ubuntu3.1_i386.deb Hash Sum mismatch
Failed to fetch http://il.archive.ubuntu.com/ubuntu/pool/main/o/openoffice.org/openoffice.org-core_3.0.1-9ubuntu3_i386.deb Hash Sum mismatch
Failed to fetch http://il.archive.ubuntu.com/ubuntu/pool/main/o/openssl-blacklist/openssl-blacklist_0.4.2ubuntu1_all.deb Hash Sum mismatch
Failed to fetch http://il.archive.ubuntu.com/ubuntu/pool/main/e/example-content/example-content_36_all.deb Hash Sum mismatch
Failed to fetch http://il.archive.ubuntu.com/ubuntu/pool/main/g/gnome-games/gnome-games-data_2.26.1-0ubuntu2_all.deb Hash Sum mismatch
Failed to fetch http://il.archive.ubuntu.com/ubuntu/pool/main/o/openoffice.org-dictionaries/openoffice.org-thesaurus-en-us_3.0.1-8ubuntu1_all.deb Hash Sum mismatch
Failed to fetch http://il.archive.ubuntu.com/ubuntu/pool/universe/t/ttf-kochi/ttf-kochi-mincho_1.0.20030809-8_all.deb Hash Sum mismatch
Failed to fetch http://il.archive.ubuntu.com/ubuntu/pool/multiverse/m/mplayer/mencoder_1.0~rc2-0ubuntu19_i386.deb Hash Sum mismatch

[chamira]

Not sure about the hash mismatch, but why don't you use the upgrade manager. I managed to get from 8.04 to 9.04 via 8.10 within Ubuntu. You need to configure the update settings to allow for all scheduled updates I think. Sorry I can't be more definite with the instructions - currently at work using Windows.

Here are teh instructions I followed: http://www.ubuntu.com/getubuntu/upgrading

[rambentuvia]

This was the result from the update manager. I did not run all the updates on 8.10 because I get failures there too. I will run the updates on 8.10 and post them

[Partyboi2]

This was the result from the update manager. I did not run all the updates on 8.10 because I get failures there too. I will run the updates on 8.10 and post them
Hi, try changing your download server under Software Sources to another one.

[slakkie]

Could you run the following:

sudo aptitude update && sudo aptitude -s safe-upgrade

if you agree with the changes:
sudo aptitude -y safe-upgrade

sudo aptitude install update-manager-core
sudo do-release-upgrade