I don't know if it is linked to my other questions (see others posts) but an Album with 2 SubAlbums has been published, i can see him in admin mode, but not without been logged.

What can i check ?

Is their parent published? If not you of course don't see them. If you are using the static html cache and viewing not logged in you need to clear the html cache and/or your browser cache.

Oh yes, the albums with problems are virtual albums and their sub albums. They apparently loose their tags...

Ok, maybe post all info right at the beginning and not one by one…
http://www.zenphoto.org/news/general-contributor-guidelines#reporting-bugs

I don't post one by one, i search where is the problem and post the results !!!

Search before posting :-) It might be important that it affects dynamic albums and not real ones. Anyway, check your permissions and the error logs and also if you have set search to return album results at all. If not a dynamic album will not show them.

To find i need a good documentation !!!

I found the solution, i suppressed dynamic albums !

[i]To find i need a good documentation !!![/i]
Which documentation exactly are you referring to?