We recommend that everybody running 1.7.x updates to 1.7.25. If you're not ready to upgrade Review Board yet, you can instead upgrade to the new Django release by running:
$ sudo easy_install Django==1.4.11
If you're running the Review Board 2.0 RCs, you can instead upgrade Django by running:
$ sudo easy_install Django==1.6.3
The final Review Board 2.0 release will include these fixes.
See the release notes for the complete list of fixes.