ADMIN INTERFACE ISN’T WORKING PROPOERLY

Hello,

I’ve noticed that my Admin – /wp-admin – interface isn’t working properly anymore.

I can add new posts or pages and give them a title, but I can’t add any text or images into the main text area (on new or old posts/pages), nor can I select the HTML tab to enter bits of code. I was last on the site a couple of days ago and was able to add content then – this just seems to have started. I’ve tried accessing from different machines at different locations but I get the same problem.

I’m using a theme called ‘Cubit’ – http://themeforest.net/item/cubit-6-in-1-business-portfolio-theme/38712 – on my website – http://www.davejohnsondesign.co.uk

I’m accessing via Firefox or Safari (usually Firefox tho) on a dual processor iMac, running OSX 10.5.7. Never had this problem before.

Any ideas or suggestions for a newbie like would be greatly appreciated.