Graham,
I have found another bug if you use the purchas (ie invoice from suppliers add stock) to add stock to the sales items it. It takes it away instade of adding it to the stock table.
this is how I found this.
1. added a new item to the stock table, but did not add qty in.
2. added the invoice from suppliers and added the qty that I got from them for the item added (which qty was about a 100 of that item.
3. was checking the stock that evening and notice that the new item that I just got in stock was showing a -100 and I sold none.
4. I tred tryed selling 10 of them to a test account to see what would happen and it went to a -110.
Not good.
I was going to buy this software but with bugs like that its not good.
Tony
PS I have also just reported this bug