Hello Guys I just want to say that avast! Linux edition is running fine in Kubuntu 7.04 Feisty. Just install libpthread20 available at packages.ubuntu.com before you install avast.
It can scan all your hard drives whether it is FAT32, NTFS, or ext3. But I think it will not delete files in NTFS because Kubuntu Feisty's support for ntfs is read only.
Theoretically, all Ubuntu products can run avast without a glitch.
Please add some replies here for other successful Linux distro that runs avast! smoothly...