I installed a Moodle 2.2.6 site basically for theme developement. Today I noticed that evey page that contanins TinyMCE editor is simply interrputed right before the editor, I got an amlomst empty page with the title. I switched of TinyMCE and the page was rendered correctly with plain text editor so rich text editor causes this bug somehow.
It's quite likely that I messed something up but I was unable to sort this out. I'd be grateful if someone give me a clue about the possible reason of this issue.