Can't get 3.0 rc2 to work at all

[Lars Hecking]

 This is frustrating, because I did manage to get the cvs HEAD up and
 running not too long ago.

 I haven't changed the web server config:

 - /webmail is aliased to /horde/imp
 - all access into /horde is rewritten as /webmail

 With imp 2.2.x, above results in loading /horde/imp/index.php when
 requesting /webmail. With 3.0, it loads /horde/index.php and no
 successful authentication is possible.

 I copied the *.php.dist files under {horde,imp,turba}/config to *.php
 and made all necessary changes, but I'm quite baffled at this stage.

 Is it possible that imp 3.0's changed method of finding it's own files

define('IMP_BASE', dirname(__FILE__));
$imp_configured = (@is_readable(IMP_BASE . '/config/conf.php') &&

 etc. get's confused by the web servers rewrite rules?