Ok. I’ll do it. Thanks a lot for your contribution and help.
Vladff,
I found it. The plugin which causes the problem is:
“PE Category Filter”
I just deactivated it now.
Could you take a look why it happens?
Sure vladff,
The link is:
http://www.danielrodriguez.com.ve
Please take a look and tell me why it happens and how to fix it 😉