Hi Alex, do you use a gavick template or something? Maybe we can check our similarities?

I am on 7.0.10 and I cannot verify the issue with 2.7.1 and 2.7.2
I can see the same issue on Github github.com/joomla/joomla-cms/issues/12460 which means that is probably a core issue unrelated to K2.

Bug found, it's tiny MCE. Switch to none or a third party editor like JCE and we are all set.

Thank you for sharing this Alexander :)
It will benefit a lot of users.

Your welcome Krikor and I am very happy to be of help! I am more of a designer then technical, but due to my 6 years of building sites in Joomla, I've learned allot. Normally I am in need of help, but tides seem to turn :)

These things tend to happen when you are into open source projects :)
Kudos!

Thanks my friend

Hello,

Not actually a core issue but an issue with multiple variants such as incorrect plugin parameters and varius was for an incorrect json formated string saved in the database.
On github.com/joomla/joomla-cms/issues/12460

For a permanent sollution check the message github.com/joomla/joomla-cms/issues/12460#issuecomment-256219685
in order to actually find what parameter throws the errror and fix it. In my case it was com_users parameters so i (hacked joomla , re saved the users Settings and restored the joomla code, voilla no more errors).

Kind regards.

A lot of heat in this thread.
Lets hope a permanent fix get into the next release.

I had another site and discovered that the problem is because of the metadata that is migrated from an older site.

I removed it from the aricles in the database and voila.