Converting ext3 to ext4 resulting in loss of data?

[Christopher Rob JONES]

> Yes it was during the installation.
> I thought the installation would have been able to do the "conversion"
> from ext3 to ext4.
> I guess there should be a warning. I found several people with similar
> case like mine.
> I'm just hoping the photorec can find as many files as possible.

I'm guessing you didn't make a backup of your data in /home, before 
attempting something like an upgrade ???