“Widespread anecdotes, including those of MacNN’s own staff, indicate that many owners of Apple’s new aluminum iMacs are experiencing severe interface lockups,” MacNN reports.
“Multiple discussion threads in Apple’s own support forums suggest that many iMacs are occasionally ceasing to accept input, despite programs and Mac OS X itself continuing to run in the background. Some users are reporting that cursors and some keyboard commands may remain functional, but that interaction is extremely limited. In all cases, the only firm solution has been a manual reboot,” MacNN reports.
“Users who have spoken with Apple technical support say that the company is aware of the issue, and that the problem has been narrowed to the ATI Radeon HD cards that power the new iMacs’ graphics,” MacNN reports.
More in the full article here.