Weird thing happend to one of my websites:
In admin panel (Joomla! 3.3.1 Stable - default backend template) after I click an item from the top dropdown menu (Articles for example) and then click anywhere on screen, the menu item disappears.
What happens in the code is that there is dynamically added inline css saying:
You can see in this video: http://screencast.com/t/EmWxcDiCg0x
Can somebody help me? What can be causing that strange behavior?
Also, when I hover over the view counters in the "popular articles" section in the dashboard, they disappear on mouse out. Strange vanishings can also be seen in few other places.
I think it may have something to do with bootstrap js, but I don't know how to check it.
OK, I've solved my problem, but I still don't know what exactly caused this. Although it doesn't really matter - the important thing is everything works now.
What helped was replacing all the files from media/jui/js folder with the files from working Joomla installation. That's all.
One or more of them must have gotten corrupted during installation or update of some extension.