w3tc minify problematic

Hiya

totally awesome plugin by the way.

small issues though and I really appreciate any help you can offer.

I am using plesk on a dedicated centos server using apache as a backend and nginx as a proxy.

yesterday the minify was working fine and there was a minified css file inside wp-content/w3tc/min/xxxx/

it then disappeared after a yum upgrade

I tried to uninstall and reinstall and reconfiguring everything

it only works if I turn off Rewrite URL structure

the minute I turn it back on, it stops

i tried caching the minify cache method between disk, memcached and apc and noticed that when i using the disk method, a folder is created by apache inside /min/ but no contents

I tried to set 777 on the folder and rerun everything to create the minified file and what I get is that the folders and .htaccess is chowned by apache:apache and not myuser:psacln

I tried to chown everything back to user:psacln and try again, that didnt work so I tried running php as a fast cgi app and that doesnt work, so I went back to apache mod with safe mode off, what then happpens is I get a file created in the folder called
default.include.css.id

the contents of the folder is this string 1350314430

nothing else.

can you please point me in the right direction?

Thanks