The sequence "AddComment" - "Preview" - "Save" does not work. You expect to keep the page contents and add an annotation or comment to the page. You get an almost empty page containing nothing but your comment. The sequence "AddComment" - "Save" works as expected.

I think you can reproduce the error on the public jspwiki website, but since "AddComment" is deactivated by default you have to type the URL manually into your browser.

To reproduce on any wiki page:

1. Open the wiki page
2. Edit the URL of your browser, replace "Wiki.jsp" by "Comment.jsp"
3. Go to the bottom of the page, there you'll find an input field labeled "Please enter your comments below:"
4. Enter some text there
5. Push the button "Preview", your comment is going to be displayed
6. Push the button "Save", again your comment is going to be displayed but the page contains now nothing but your comment. Any previously available content is deleted
7. Please restore the original contents of the page via "MoreInfo..."

To reproduce on a testpage:

1. Open the wiki page via this link
2. Go to the bottom of the page, there you'll find an input field labeled "Please enter your comments below:"
3. Enter some text there
4. Push the button "Preview", your comment is going to be displayed
5. Push the button "Save", again your comment is going to be displayed but the page contains now nothing but your comment. Any previously available content is deleted
6. Please restore the original contents of the page via "MoreInfo..."