Well I don't known what I did but I flashed, again, cm10.1 konstaKANG 29/03 and at beginning I had the same problem with some apps (compatibility??). Now it allows to install almost all apps (just did some reboots) but I still can't install s2e, at his moment I am using link2sd.
I do always full wipe.
What can I have done wrong?
When I try to restore apps with titanium it says that it doesn't have any backup in this platform (??) Before I tried cm10 and no problem with evernot or titanium.
I really like this rom.
Well I had some problems with my apps (not gapps) with backups that I did after install s2e. But if my backups were made without s2e installed all my apps are still there. I don't know if this is relevant or not.
After install the first ROM we get addicted. Every time I see a new update I can't help myself, I have to install it.
I would like to thank to all developers to share their work.