There was a request for further clarity on how to revert to Camera Raw 5.4. Please follow these instructions:
1. Close Photoshop CS4 and Bridge CS4
2. Download the Camera Raw 5.4 plug-in from the following location: http://www.adobe.com/support/downloads/detail.jsp?ftpID=4521
3. Navigate to: (Please read directory carefully)
Library/Application Support/Adobe/Plug-Ins/CS4/File Formats
4. Delete the Camera Raw.plug-in file located in that directory
5. Open the Camera_Raw_5_4 DMG file downloaded in step 2
6. Copy the Camera Raw.plug-file from the DMG file into the direcotry indicated in step 3.