Catalog price rules core bug in Magento CE 1.9.1 and EE 1.14.1.0 (Array to string conversion error and incorrect price rules behavior)
Short summary of the problem – if you have Magento catalog price rules with multiple select attributes in conditions or ONE OF price rules conditions with comma separated values - on latest Magento versions – you can have Array to string conversion error during you apply rules or incorrect rules behavior.
Issue reports:
- http://magento.stackexchange.com/questions/36195/catalog-price-rule-containing-several-sku-s-doesnt-work
- http://www.magentocommerce.com/bug-tracking/issue/index/id/278
- http://www.magentocommerce.com/bug-tracking/issue/index/id/544
More details and tests - http://firebearstudio.com/blog/catalog-price-rules-core-bug-in-magento-ce-1-9-1-and-ee-1-14-1-0-array-to-string-conversion-error-and-incorrect-price-rules-behavior.html