"Content-Type" header (which was originally added in 1.18.0), API client must now explicitly add input parameter "sendContentType" = 1 to every request. Changing Content-Type for all requests had an adverse effect on existing API clients."addedByUserName" and "lastModifiedByUserName" have been added to API call getPriceLists"batch" has been added to API calls getSalesDocuments"originalPriceIsZero" = 1."getProductsWithReorderPointDefined" = 1 or "getProductsWithRestockLevelDefined" = 1 did not return products with which no inventory transactions had taken place yet."price#" and "discount#" input parameters. This did not work if product's original price on product card was 0 and its price had been specified in a price list.