Problems occurred after moving website from local server.

Get this error on the dashboard:

Warning: array_keys() [function.array-keys]: The first argument should be an array in /home/seniecom/public_html/wordpress/wp-includes/theme.php on line 513

If i try to edit the theme, it says it's broken, can't locate where the files are & it can't find the stylesheet. If i click on the theme it completely breaks and i get a blank page.

Don't know what error means or what to do about it? (this is my first wordpress site)

Website working fine on local host. I have disabled all the plug-ins except the gallery.

I'm using:
atahualpa351

Here's a link to the website: http://seniseneviratne.com/wordpress/
and a couple of the pages:
http://seniseneviratne.com/wordpress/?page_id=189
http://seniseneviratne.com/wordpress/?page_id=269

Can anyone help?

what happens if you switch to the twenty-ten theme?
did you 'move' the site from the local server or do a new install?

Have changed it to twentyten ok.

Now not able to change it back to Atahualpa (attached screenshot of problem before changing to twentyten).

To move to live server:
I ftp my existing wordpress folder.
I made new database and then imported existing database.

did you change the url references in the sql from your local server to the live url?

I changed the url in dashboard/settings before i exported the database (mainly because i looked into changing it in phpMyAdmin but couldn't work out how to do it)

attached: wp_options in database

Is this the right URL?

It looks like you have n install problem, something is missing. Check to see if in the atahualpa theme folder you have all the files - I note that there is a message in your first image that says the style sheet is missing - so make sure that 'style.css' exists

If I were you, I'd just delete the atahualpa theme folder, download a new copy and install it manually (see - http://forum.bytesforall.com/showthread.php?t=8520)