[Seaside] How to write a Seaside application which survive seaside upgrade

[Dmitry Dorofeev]

Hello,

It seems that i got some mess after upgrade to latest Seaside.
My app shows an empty page.

When i try to config it, i see a lot of debugging info with all
my classes shown as AnObsoleteMyClassName

I just removed my app with remove link and readded it. Now it works.
I can try to upgrade again to see if it is reproducable as i saved my 
previous image.

Lost in Squeak :-)
-Dmitry.