Hitting the backbutton in the browser causes the fckeditor to display the HTML tags
January 13th, 2009
Add following code to file: FCKEditor\editor\fckeditor.html
window.onload = function() { // 25-11-2008 Han: Fixing the issue with the backbutton, when the back/forward button is hit then the html to display is // still HTMLEncoded which will cause the control to display html control sequences in the editor. // The easiest solution is probably to always htmldecode the value before it is beaing displayed in the editor, this can be done // using the statement below. // FCK.LinkedField.value=FCKTools.HTMLDecode(FCK.LinkedField.value); FCK.LinkedField.value=FCKTools.HTMLDecode(FCK.LinkedField.value); // THIS LINE InitializeAPI(); // existing code line ....... }
After adding the code line you will have to make sure that the javascript is downloaded to the client, so in your browser delete the local files ( tools->internet options->delete files).
And then it should all work as expected.
Source: FCKEditor forum