Computerworld – Graphics issues have caused Apple to delay shipments of the 27-inch iMac model until the cause of the problem can be determined.
The blog also reports that Apple resellers have been told of delays of 2 weeks in order to give Apple time to replace the graphics cards on the 27-inch iMacs. The iMac model in question comes in either dual-core or quad-core formats and contain the AMD ATI Radeon HD 4670 or 4850 model graphics cards.