I just viewed the page source and see that the "Post Rely", "Upload a File" and "More Options..." are all embedded in the text area FORMS script by way of CSS and are JavaScript active (not java or flash) and are remotely called via database reference.
This may explain why one or more features are not consistantly displayed or will appear after refreshing the screen while on the page (a database delay may cause a failure of the features to load when first coming to a page)