If you are working in a multi-layered document in PSE3 and you jump over into Quick Fix mode, make note of the layer you are working on. If it is an Adjustment Layer, all the options in the Quick Fix mode will be grayed out. Here is a cool trick to switch the layer you are working on without exiting Quick Fix mode. Select either the Crop or Red Eye Removal Tool, (in Windows) then hold down the Control (Ctrl) key and right-click on your image. This will give you a context menu of the layers in your document. Just click on the layer you want to work one. If you're working on a Mac, and you don't have a two-button mouse, Cmd + Ctrl + click, then follow the rest of the steps.
Very cool trick, eh? (Note: To select a layer by Ctrl + right clicking on it, you must click on an area of the layer that contains information, i.e. not transparent.)