Hello,
I tried to install 2.5.1 - same problem
Went back to 2.5.0 (my previous version before I updated to 2.5.2) - manager works again.
Any ideas?
Thomas
Did you manually delete all files in the core/cache directory?
That problem is often caused by leftover content or cookies in your browser. If visiting the site in private or incognito mode solves the problem, that's the issue.
discuss.answer
Did you update TinyMCE to 4.3.4?
Tassu, webmaster of Valokammi