Hi,
the reason of 500 error on __css.php is probably php configuration, which prohibits execution of files with writable set to everyone. You should test it with setting 755 on
[list:gi50su16]data, data/Base,
data/Base/Theme,
data/Base/Theme/template,
data/Base/Theme/template/default,
and data/Base/Theme/template/default/__css.php
[/list:u:gi50su16]
phpfm allows you even execute system command, but it's right. The only one who is able to do it is super administrator. Without login you are unable to do it. If I am wrong please point me where...
Cheers
Paul