hidden pannel working on background. How can I remove it?

suddenly my panel dissapeared.
Indeed it didn’t absolutely dissapeared, it’s on the bottom of the screen where it used to be but it’s just a clear box.
I cant’ remove it (mouse right button click does not give me the chance).
I’ve created a new panel but notifications (for instance kopete popups) are duplicated.

I would like to recover mi old panel or kill it but i don’t know how.

any help?

regards

Does logout/login again help?

Could you please post a screenshot?

No It didn’t. Even restarting didn’t help

Could you please post a screenshot?

I can’t because it dissapear and I don’t know why.

I was trying to solve a X server problem (I’m going to start another thread to tell the story), I was using the same /home partition with different SO installations when the hidden pannel issue. I did some reboots to change from one SO installation to another and in one of them the hidden panel dissapeared and it has never appear again.

regards