This weird situation happened when I try to publish my last post ( blogging like problogger ). I’m having trouble with my blog. All my posts had been categorized to Uncategorized. Going to /wp-admin/categories.php all my categories appeared to have been removed. So I go to recreate them and get "The category you are trying to create already exists." It did not show up in the list. The categories did not appear in my list. The categories do not also appear when I edit the post and select "All Categories" from the category box. However, if I select "Most Used" from the category box some of the categories appear, but if I attempt to use one of them in the most used list and save it. It does not seem to reflect on the site.
Same goes to my tags..
When I browse my database and check the tables, I can’t edit it. Can someone please provide me some direction on how to correct this.
below is the screenshot
Someone pls help….
UPDATED : Everything is fine now! 
{ 5 comments… read them below or add one }
Wow that’s too bad for u.did u find any solution?i will try to ask my friends.well i read that ur wordpress got blank.what changes did you made after that?did you try to ugrade or atleast change ur all wordpress entries?i hope you didn’t use ‘clean options’ plugin to clear some wordpress table entries.
I find out that my problem caused by my hosting server. There were migrating and upgrading to new server. That’s why my database mess up. Now it seems to be ok as usual. I don’t make any upgrade but I try to figure out the solution by change a little bit previous entry, check my database and update my database, deactivate all the plugin. But then everything back as usual and I thought it maybe caused by the server.
That is great.You can also use ‘clean-option’ plugin to remove table entries of inactive plugins or left over of the previously installed plugin.it did help me to improve my blog speed.Sometimes plugins do make some problem. happy blogging
thanks for giving me suggestion. happy blogging too
this post is very useful to me,thank you