This changes the "Decrypt" link for the cache hint, so that when it's clicked, the hint is instantaneously decoded. No need to wait for the page to reload.
Also, this decrypts only the cache hint. Any encrypted spoilers contained in logs will remain encrypted, so it won't accidently ruin your cache hunt.
Greasemonkey 0.6.4 (Firefox 1.5) Compatible!
To install, right-click on the icon, and select "Install User Script". If you do not see the menu option, click on the icon to open the file in a new tab (or window), and select "Install This User Script" from the Tools menu.