after applying the latest update, it was discovered that the unit price on invoices took on a life of their own on existing orders. the prices show up, but do not reflect the discounted list prices, nor the list prices itself. They seem to be random prices usually above the list price. The extensions are a multiplication of qty and that wrong unit price.  
It does not affect orders entered after the update and orders with contract prices.
I found a method to correct it: Go through every line and the price resets. The problem with that is, that when extra discounts where given, they also reset to the standard discount.  
Did anybody experience this problem after the latest update?