duration 6.x-1.0-rc1

The API seems to work pretty nicely so far, which means this is mainly a bug fix release for a few edge cases.
Nevertheless, the API has been changed from uppercase function names to lowercase ones (with Views as role model) so any modules depending on the Duration API module will need to be adapted too, or they'll break. But hey, I haven't been at 1.0 still, so this can be expected.

The user interface part is pretty much the same as in the original 0.9 release. The API, apart from being switched cases, has a new facility called "conversion factors" which makes it possible to e.g. count a day not as 24 hours (which is still the default) but as 8 hours instead (like you might expect from translating work days into hours).