locksoftThe plugin I was using is “simple tags”. I mainly installed because it adds a better looking tag cloud widget. I didn’t know it also lets you add tags to pages, a function that it’s not available in vanilla WP. To be honest I didn’t realize it because on my main blog I use a specific plugin (“Category Tag Pages”) that adds tags to pages, so I was thinking it was a standard thing.
At the moment “simple tags” is disabled, because it has issues with the last version of WP (it interfere with editor so, if you change tags there, they’re not saved). But, beside the better looking widget I used it because it showed all available tags in editor window, and it’s very important to me, so I won’t forget to assign them.
Anyway it seems FolioPress doesn’t manage tagged pages at all. I didn’t try one of WP standar themes because I’ve removed them but I tried another third party one and it correctly manages them.