I upgraded to 3.5.3 and all was well until I installed some plugins in an attempt to speed up my admin pages which load so slowly I could walk round the block 10 times before one loads!
The plugins are WP-Optimize, WP-Super Cache Plus, WP-SmushIt and Crack Stack. Like an idiot I activated them all at the same time so I don't know which is the culprit and I've tried deactivating them together and separately but the result is the same.
Basically, my site has disappeared! All that remains is the page background colour but there is no header, no sidebars, no text, in fact nothing at all! If I use a different theme, then it's all there as normal.
The other thing I did was delete the previous version of Atahualpa as I didn't think it would be needed any more.
I tried deleting the theme and re-installing it but with the same result. I don't even mind if the original theme is reinstalled and I have to change all the settings to what I want again, so if that's the answer, please can someone tell me how to remove everything to do with the theme and start again.
Sorry about the ramble but I'm at my wits' end.
Also if anyone does know how to speed up Wordpress Admin, I'd be grateful. Mine just suddenly started going really slow when it had been fine and I hadn't made any changes. It's the same for all my sites.