A while back I installed Dreamlinux 3.5 Gnome edition using ext2. When I attempted to use the email address books I imported from the Dreamlinux3.5 XFCE edition, which had been ext3, I discovered that none of the email addresses could be mailed to. I had to manually type in the addresses.

When I reinstalled Dreamlinux 3.5 Gnome using ext3, the same backup files that did not work in ext2 now work just fine. The question is, was this a "broken data" problem caused by the switch to ext2 file system or something else? Has anyone else experienced this?

FYI, the mail program is Thunderbird.

Unlikely a file-system issue; more likely a "different distros store/expect
files in slightly different locations" thing.

No. It was the same Distro with different desktop manager. Everything is in the exact same place.