Default period and account in invoices line for multi-company doesn't work

version 6.0-dev revision 3256 on ubuntu10.10

Using multi-company when you create an invoice and change the company of the invoice from default installation company to a new created one (with accounting and fiscal year configured), the company_id of the period to account doesn't change when executes _check_company_id and it doesn't allow to confirm the invoice. If you select 'Force period' to the correct one it works.

Another problem after changing the company in the invoice, is that the product line changes the account from the regular (in my case 700000) to the view one (7000). I checked that products category accounting was correct. When I try to change the account into the invoice line, it opens the list accounts in blank.