Upgrading through apt source

[Koh Choon Lin]

Hi all

Can anyone tell me what are the consequences for a box on 10.04, I
change all the repositories to 10.10 and upgrade all the software? I
realized it could be done and its still working fine after weeks now.
Now, I am thinking of changing it to 11.04.

Is there a list of tasks not done this way instead of upgrading the
proper way, ie. "update-manager -d"?

Thanks!