Issue with Path alias and directory creation

We're trying to run Boost 5.x-1.x-dev along with Pathauto 5.x-2.3 on a production site. Static pages are created, but in the wrong directory within the cache folder and therefore not served. Main contents are at http://example.com/content/nid. While Boost creates an empty (...)/0/content/ dir in the cache folder, the actual files still go into (...)/0/node/. If we access content via http://example.com/node/nid static pages are retrievable, but using the actual alias doesn't work.

Any help or pointer in the right direction would be appreciated.

-- jan