The Last Active directory (for IE8) is not cleaned by default:
C:\Documents and Settings\user\Local Settings\Application Data\Microsoft\Internet Explorer\Recovery\Last Active
I can do this manually by first going into Windows Explorer and selecting:
Tools > Folder Options... > View
then unchecking "Hide protected operating system files".
Then, in ccleaner (must be restarted after the above change), go to:
Options > Include > Add Folder
Browse to the above location (replacing "user" with your Windows username) and select.
Make sure to select the checkbox labeled "Custom Files and Folders" under "Advanced", then run ccleaner.
Question... should this not be cleaned automatically via one of the ccleaner options?