Right Wing Slayer has the scoop on why the Time/CNN 55% approval ratings have not shown up on pollingreport.com:

Pollingreport.com comes clean on Bush approval numbers - Time pollsters are HIDING them! To: Editor@PollingReport.com Most recent Time magazine included a graphic showing a CNN/Time poll which had Bush's approval numbers at 55%. Just curious as to why you didn't include these numbers in your latest updates. From: Editor@PollingReport.com Thanks for your note. Time/CNN Poll results are released to us by their pollsters. So far, what they’ve sent us from the Dec. 17-18 poll has not included an overall Bush job rating. When and if they provide it to us, we’ll report it.

We await comment from Glenn Reynolds on this curious omission.