Patch day has been put on hold for DC Universe Online (DCUO) fans. SOE has delayed the release of Game Update 12 to resolve a “serious technical issue” with the update. Assuming all goes as planned, DCUO fans should see the update sometime tomorrow.

Due to a serious technical issue, Game Update 12 has been postponed. There is a tentative plan to release this content at the same time tomorrow. We apologize for any confusion and thank you for your patience.

Source: DCUO Game Update 12 Announcement