Since upgrading to latest WP 3.8 and also the latest Jetpack version 2.7 I have had major issues with the posting page.
-Not being able to toggle from text to HTML view in the editor
-Not being able to toggle tags up or down or see custom fields
-My own tagging plugin not working Strictly AutoTags that worked before perfectly.
-Not being able to see Yoast SEO options on the post page
-Other issues including the Stats page taking me to WP-O-Matics stats page instead of my old stats page.
Also I don't know if this is Jetpack or not but shortcodes for Youtube are suddently not working e.g this
<iframe width="560" height="315" src="//www.youtube.com/embed/w_dO7T3AF8s" frameborder="0" allowfullscreen></iframe>
or any other version with extra paraemters in the querystring ARE not being converted to IFRAMES/OBJECTS on the page.
I can embed the actual IFRAME code in and it will work.
However disabling Jetpack doesn't fix this and posts where videos where showing from months ago are now NOT showing and instead the shortcodes are being displayed on the page e.g
I wasn't going to update to 3.8 as I thought there would be bugs - like the last main version. This seems to happen a lot for some reason.
Any help with this last issue would be much appreciated as I really don't want to write my own function code to convert shortcodes into youtube iframes etc.