After installing Sabayon 4.0 r1 x86-32, Spritz suggested me to update the packages in my system.
As per micia suggestion (viewtopic.php?f=76&t=16238&p=92674#p92674), I updated Spritz first, and it all went OK.
Though, after the installation of 300+ packages in my system, following problems appeared:
* It updated the kernel from 2.6.27 to 2.6.28. For the first one I had the sources in /usr/src/linux, or the kernel config at least (I could do make menuconfig), but now there is no sources and no kernel config. Is there any way in which I can download the kernel sources using spritz, and the configuration file for my current kernel? Why now /usr/src/linux is a symlink to a dir /usr/src/rpm?? What rpm stands for?? (Redhat Package Manager ¿?? What's got it to do with my kernel??)
* It broke dependencies for several applications I had emerged after clean installation of 4.0 r1 x86-32. For instance, I installed gnome-commander using an ebuild from its webpage, and proper instructions for emerging from ebuild files. Now it does not find a library on which it depends on, and does not start. I'm trying to solve it with revdep-rebuild, but don't really understand why Spritz did that: isn't entropy supposed to work consistently with portage?
* It installed an older version of Portage than the one I had (emerge told me so when doing "emerge --sync"). Is that normal? I emerged portage over again, but I wonder if one of these days Spritz will tell me over again that some packages are outdated in my system, and actually install an outdated version of portage. Isn't that crazy?