A new release of Parrot is out and, in this release, you can find two bug fixes.
The first one is related to those using contracts to create orders and then using combined shipments to invoice the orders. Doing this could cause a default Next Posting Date on the Contracts the orders originated from. This is now fixed.
The other bug was related to those who have created a contract with an ending date in the header and added lines before activating the Advanced mode function on the contract. If you later changed the ending date on the line the one in the header was still the active one. This is now fixed.
In conclusion, if you use Contracts to create orders or use the Advanced mode you are best to update Parrot to the latest version.