[support] help with Drupal 6 theme inheritance

I'm hoping to get some help with what should be an easy question: how do I inherit a core theme? After looking at the docs it seemed that by creating a .info file and setting the base theme I would have inheritance set up. I tried that with this: name = development - testing theme based on Garland core = 6.x base theme = garland After activating this theme I lost all styles. The base theme directive seems to do nothing. My theme is in sites/all/themes/garland-dev; garland is in themes/garland. Please advise. -- La perfection est atteinte non quand il ne reste rien à ajouter, mais quand il ne reste rien à enlever. — Antoine de Saint-Exupéry