I upgraded to 2.3.3 just yesterday (I know, bad bad bad.) Everything seemed fine until today when I tried to make a page. I inserted an amazon product link into the page, and then tried to insert the code that would make product previews.
I have used this code before with no trouble, but today, when and ONLY when I try to save the page with this snippet of code in the entry, I get this error message: "You don't have permission to access /wordpress/wp-admin/page.php on this server." It does not happen when I don't try to insert the preview code!
If, once I get that error message, I hit refresh, I am taken immediately to the "manage pages" page... and the OLD version of the page, without the preview code, is there.
Previews are still working on my other entry that uses them.
Any ideas? Thanks a bunch!