Thread:Project talk:Support desk/CSS stylesheets not loading correctly after upgrade 1.5 - 1.20.05

If found some earlier threads about this problem, but I have not been able to reach a solution. My case is bit special as I have TWO separate mediawiki isntallations on same virtual server.

My setup  wiki.xxxx.com/it now running 1.20.5  wiki.xxxx.com/cd still on 1.5.x

if I look at working /cd main_page source I see this:
 * ''
 * 
 * 
 * 
 * 
 * 
 * 
 * 

'' But if I look at upgraded /it source I see only this:
 * ''
 * a:lang(ar),a:lang(ckb),a:lang(fa),a:lang(kk-arab),a:lang(mzn),a:lang(ps),a:lang(ur){text-decoration:none}
 * /* cache key: mediawiki_it-mw1_:resourceloader:filter:minify-css:7:efb677ba611191e9f30fad6f893ae33f */ ''

So one basic stylesheet is loaded in /it but most are missing.

I have been playing around with without any result: $wgScriptPath, $wgLoadScript, $wgServer

Also there are no errors in http error log concerning this. So how do I get skins: common/shared.css, common/commonprint.css and monobook/main.css loaded in the new version?