Missing Categories in WP3.0.4

Hi Everyone

In the “Dashboard”, it shows that in my blog I have “12 Categories”, “10 Posts” and etc.

What happen is when I click “Posts/Categories”, there are no listing of any existing 12 Categories. I tried creating a “Testing” category and click “Add New Category” and it doesn’t get listed there if I were to exit and then go lets say to Pages and then back to “Posts/Categories” to look for “Testing” category. But this “Testing” category got updated in my “Dashboard” as the 13th Categories.

By the way, if I were to go to “Posts/Posts” to take a look, my 10 Posts become “Uncategorized” and “No Tags” …

So it seem that all my 13 Categories are being “hidden” somewhere… doing a “Search Categories” do not show up any result.

The strange thing is these 13 Categories will show up in “Posts/Categories” at random time. And it affects my Site because I made use of the “Categories” as my “Menu Items” (I use “Appearance/Menus” to create a Menu with the 12 Categories as listing). If the Categories misbehave, you can imagine my site has no menu …

I tried to deactivate all Plugins and this strange behavior still persists. The categories shows 1 min … and then the next min they disappear …

Does anyone have the same problem as me?

Thanks.

Regards