Comment 7 for bug 588154

Two solutions can be implemented for this problem :
1/ we can refuse to change the state to "done" for all the stock moves dated before an inventory of the same product and location.
2/ we can make the function field "qty_available" (and others) use the latest inventory as a starting point to compute the current quantity, and only add the stock moves dated after the inventory.

Solution 2/ might be a performance booster, but it's pretty subtle because a product can be in many inventories at many dates in many locations.
So we're currently implementing solution 1/ and we hope to push a branch tomorrow.
Lionel Sausin