That's the because of semantic stickyfunc mode. Try M-x global-semantic-stickyfunc-mode.
OK thanks. With that, the header-line disappeared.
I guess it appeared because I have (semantic-load-enable-code-helpers) (as in the cedet INSTALL file), do I really need this?
another artifact that appeared yesterday too was an overline right above a class body, just like this:
__________________________ class TestSocket extends Socket{...
and a similar overline right above the main method of that class
So what are those lines meant for? Felix