Hi,

This issue is related to this post:
http://ez.no/developer/forum/install_configuration/ezwebin_classes_in_3_10_rc1_plain_type

Steps to reproduce

All steps to install the ezwebin_classes.ezpkg package on new Plain type 3.10.rc1 installation are the sames as the ones decribed in this french article (many screenshots to follow all the steps):
http://www.luxpopuli.fr/ez_publish__1/configuration__1/ez_publish_installer_ezwebin_classes_ezpkg_a_la_main

In inglish:

1°/ Download ezwebin_classes.ezpkg
2°/ Go to Administration tab in administration interface
3°/ Clic to Packages link in left menu
4°/ Select ez_system repository and validate with "Change repository" button
5°/ Clic to "Import new package" button
6°/ Follow all the installation steps (no trouble occured)
7°/ At the end of the installation, clic to "Classes" link in the left menu
8°/ Then, we can see a list of the last modified/changed classes. And we can see, as showed by this screenshot http://linuxorable.fr/apache2-default/3.10.rc1/recent_changes.png, five always-available classes.
9°/ But, as showed by this screenshot http://linuxorable.fr/apache2-default/3.10.rc1/Content_ClassGroup.png, these classes seem to be not present into the system (at least, they are not in any class groups). And some other classes are missing too.

Pascal