We have found an unexpected behaviour in the current SAXESS 4.8.0 production system when using orders with hidden volume (also known as iceberg orders). Under certain conditions the time priority of the order can be kept when a new time priority should have been assigned to the order. The behaviour will be corrected in the new SAXESS release on June 2nd 2008. For further questions please contact your local surveillance or Market Place Operations. We apologize for any inconvenience. For further information concerning this exchange notice please contact: OMX Nordic Exchange Market Place Operations: Stockholm: phone: +46 8 405 6570 email: saxkb@nasdaqomx.com Helsinki: phone: +358 9 6166 7261 email: helsinki.stockevent@nasdaqomx.com Copenhagen: phone: +45 3377 0429 email: cse_mpo@nasdaqomx.com Iceland: phone: +354 525 2850 email: help.ice@nasdaqomx.com Trading Surveillance: Stockholm: Phone: +46 8 405 6290 Email: tss@nasdaqomx.com Helsinki: Phone : +358 9 6166 7260 Email : tsf@nasdaqomx.com Copenhagen: Phone : +45 33 77 04 59 Email: Stockwatch@omxgroup.com Iceland : phone: +354 525 2850 email surveillance.ice@nasdaqomx.com