The available buttons in the orange bar at the top of forum pages change depending on which page is being shown.
Some pages show:
HOME | HELP | SEARCH | PROFILE | MY MESSAGES | LOGOUT
Other pages show:
HOME | HELP | LOGIN | REGISTER
Both versions appear when I am logged in (I would only expect the second one if I was logged out).
Pressing HOME or HELP on the second version will give the first version.
Is it me or is there a problem with the site?
I don’t see this, all normal here.
This is all I see:
http://www.screencast-o-matic.com/screenshots/u/Lh/1384613652513-93151.png
I’ve also read another post where someone was missing some expected buttons
so at this point, either of your assumptions could be correct. 
Actually, I’m wrong!!
Pressing HOME or HELP doesn’t always give the first version.
Makes it a bit difficult to log out!!
It does for me so the log out button is still there.
(I never log out.)
Everything is working fine for me.
No strange things at all.
Just a guess, but it can be a corrupted download of one or more page(s) and stored in the cache of the browser.
Close the browser, empty the cache and check if the problem is solved.
Or, hold down ctrl and click “reload page”, that will force the browser to reload the page from the server and not get it from the cache (if it is there)
Not just you, it’s happened at my end a couple of times today. :-
Never noticed it before today though.
Excellent!! Thanks Eddy.
That has fixed it!!
Strange because I cleared the cache early this morning and was still getting the problem!!
Don’t you just love computers?