Basic Features Not Working

Hey,

So I'm just editing some pages, really simple task, but then I've noticed that none of my drop-downs are working and the Screen Options menu doesn't work. I tried uninstalling a few plugins, including WPMU, but that didn't seem to do anything.

This is only happening in the pages editor, nowhere else as far as I can see. The link editor doesn't work for existing content either, nothing shows up.

History:
The only thing I can think that I've done that may affect it is a search and replace query in the SQL on the posts table. I took the Wordpress environment from local dev to online test and needed to change the linked URLs.

Do we think that this has affected my dashboard etc. And does this mean I'm then back to the absolute vs relative issue of having to copy and paste every single link on my website?

Cheers!

Scott. =)