in the webassist/plugins/shopping_cart/pp_expresscheckout.pgp file, change:
$WA_PP_ECO_Do_itemized[0][$nextIndex] = "Name" . strval($cartIndex+1) . "";
$WA_PP_ECO_Do_itemized[1][$nextIndex] = "".$WA_Store_Cart->DisplayInfo("Name") ."";
to:
$WA_PP_ECO_Do_itemized[0][$nextIndex] = "Name" . strval($cartIndex+1) . "";
$WA_PP_ECO_Do_itemized[1][$nextIndex] = "".$WA_Store_Cart->DisplayInfo("Name").((strlen($WA_Store_Cart->DisplayInfo("Options")) > 0)?'--'.$WA_Store_Cart->DisplayInfo("Options"):"") ."";