If you have not updated your Joomla website to the latest version, you should it now. With the new Joomla 3.4.4 version, a low security problem is fixed. Beside this, there were some cleanups in the en_GB language, some installation fixes for MSSQL and PostagesSQL, updates for jQuery, HTML5hiv and CodeMirror and codestyle rules implementation has been finished.
To this version has been contributed 36 volunteers with over 500 code commits. A big thanks to all of you!
When I have updated to this version, I found a very strange bug. I was unable to click the “Save” button on modules and Global Configuration page. The Joomla admin panel also looked a buggy. So I decide to change the admin template. Unfortunately I have deleted all the admin templates, only the isis was installed. I have accessed my website via another browser and found out that everything worked ok. So I have cleared the browser cache and this fixed the issue.
So if you are upgrading your Joomla website to the latest version and something is not working, make sure you clear the browser cache.