Such a fickle public

How quickly impressions change, or the new wears off.

But I suspect that if the economy improves, the ratings will too.
And I'd note that comments on the financial markets have gone from "don't pay attention to tracking polls", to "things are looking up."

Obama's Poll Numbers Are Falling to Earth - WSJ.com:

"Polling data show that Mr. Obama's approval rating is dropping and is below where George W. Bush was in an analogous period in 2001. Rasmussen Reports data shows that Mr. Obama's net presidential approval rating -- which is calculated by subtracting the number who strongly disapprove from the number who strongly approve -- is just six, his lowest rating to date.

Overall, Rasmussen Reports shows a 56%-43% approval, with a third strongly disapproving of the president's performance. This is a substantial degree of polarization so early in the administration. Mr. Obama has lost virtually all of his Republican support and a good part of his Independent support, and the trend is decidedly negative.

A detailed examination of presidential popularity after 50 days on the job similarly demonstrates a substantial drop in presidential approval relative to other elected presidents in the 20th and 21st centuries. The reason for this decline most likely has to do with doubts about the administration's policies and their impact on peoples' lives."

Mr. Schoen, formerly a pollster for President Bill Clinton...