After updating from Magento 1.2 to 1.4 I noticed that the Lifetime Sales amount was incorrect (other sales reports are fine). Even after making a fake order the Lifetime Sales didn't change. I tried refreshing statistics but nothing happened. Searching the web for this problem turned up a lot of people with the same issue but no solutions. Any suggestions?
The fake order was added to Lifetime Sales after changing the state from Pending to Processing (or Shipped). Therefore my guess is that Magento changed the way it calculates Lifetime Sales and doesn't take Pending orders into account (any more). Any other small differences are due to the fact that Taxes and Shipping are not included in Lifetime Sales.