From the 1.5 beta thread:
If you start your week on a Sunday, the week is almost over.
A week in ‘Renoise speak’ usually means 2 weeks or a month…
It means that to all programmers trying to get a project finished. 
Something always comes up, or it takes double the time to do something you thought it would.
Don’t worry, you’ll get your public beta before christmas.
There are just a few irritating bugs being removed…
(Also in every pre-test release, bugs are discovered and removed before going public)