No matter where I am the forum will not treat me as logged in after I logged in until I browse to a different page on the forum then browse back to where I was. If I am at the english language forums index and log in, it reloads the page after logging me in but the page still thinks I am logged out and does not show the "New topic" or "Mark all read" buttons, it doesn't show them when refreshing the page (F5) or when going to another page then clicking the Back button either. It will only show the buttons and treat me as online if I visit another part of the forum then navigate via the forum back to where I was, so for example browsing to forums index then clicking the link on the loaded page to return to english language forums index.

Same issue applies for when viewing a topic/thread when logging in, I must either navigate to another page of the topic or another area of the forum then navigate back before the "Post reply" button and the Quick Reply area become accessible.

None of this makes sense as the URL for the current location both before and after logging in remains exactly the same so a refresh (F5) of the page should update the page to reflect me as logged in. I use Latest stable iteration of Firefox 4 under Windows 7 Home Premium x64 with the latest Windows updates.